Fix some typos, grammar, etc., and add details (#1418)

* Fix some typos, grammar, etc. on the site

Fixes some issues with typos, capitalization, grammar, and et cetera.

* Fix typo, grammar, etc. in repository

* Update README.md
Mention Discourse community earlier, add missing period

* Update CONTRIBUTING.md
i.e. is used for equivalence or clarification while e.g. is for
examples. For instance, we shouldn't say that IMAP is equivalent or an
explanation to all open-source software used to access email (e.g.
there's POP3, open-source clients to access when there isn't IMAP such
as Tutanota, etc.).

We also shouldn't call IMAP open-source software since it's a protocol.

* Change "socially motivated

* Apply suggestions from code review

Co-Authored-By: Jonah Aragon <jonah@triplebit.net>

* Suggestion from code review with extras

* 'Kill switch' to 'Killswitch"

* Consistency and minor additions to details

- More parallel sentence structures, following <Name> <Verb phrase>
for the first sentence of cards. Related to issue #1420.
- Make Njalla parallel to the others, and mention Njalla
is based in Nevis with VPS in Sweden
- Don't use "us" when talking about external services
- Orange Website also provides domain registration
- Update capitalization and add more hyphens
- Mention that TOS;DR evaluations are done by the community and that
  they also evaluate privacy policies (see https://edit.tosdr.org/about)
- "E2EE encryption" is redundant since "E2EE" already has "encryption"
in it. Might as well expand it since full term is used later on.
- <Name> <Verb phrase> structure for Magic Wormhole
- For consistency, don't start Worth Mentioning entries with the name
- https://english.stackexchange.com/questions/27707/post-hyphenation-of-split-compound-words
- All the other "alert alert-warning" don't repeat the generic name and 
we also don't say 'a software'

* instant-messenger: Remove <em>, more cleanup

* voice-video-messenger: Hyphens and cleanup

- We don't say "a software" so replace it with something that works

* paste-services: Cleanup & change cryptography info

As per CryptPad's whitepaper and FAQ:
https://cryptpad.fr/faq.html#security-crypto
https://blog.cryptpad.fr/images/CryptPad-Whitepaper-v1.0.pdf

Fixes #1417.

* encryption: "open-source"

* Page descriptions and other cleanup

_includes/sections/browser-addons.html

@@ -7,7 +7,7 @@
 {% include cardv2.html
 title="uBlock Origin: Block Ads and Trackers"
 image="/assets/img/addons/ublock-origin.png"
-description="<strong>uBlock Origin</strong> is an efficient <a href=https://github.com/gorhill/uBlock/wiki/Blocking-mode>wide-spectrum-blocker</a> that's easy on memory, and yet can load and enforce thousands more filters than other popular blockers out there. It has no monetization strategy and is completely open source."
+description="<strong>uBlock Origin</strong> is an efficient <a href=https://github.com/gorhill/uBlock/wiki/Blocking-mode>wide-spectrum blocker</a> that's easy on memory, and yet can load and enforce thousands more filters than other popular blockers out there. It has no monetization strategy and is completely open source."
 website="https://addons.mozilla.org/firefox/addon/ublock-origin/"
 forum="https://forum.privacytools.io/t/discussion-ublock-origin/266"
 github="https://github.com/gorhill/uBlock/"
@@ -43,7 +43,7 @@ opera="https://addons.opera.com/en/extensions/details/https-everywhere"
 {% include cardv2.html
 title="Decentraleyes: Block Content Delivery Networks"
 image="/assets/img/addons/decentraleyes.png"
-description="<strong>Decentraleyes</strong> emulates Content Delivery Networks locally by intercepting requests, finding the required resource and injecting it into the environment. This all happens instantaneously, automatically, and no prior configuration is required."
+description="<strong>Decentraleyes</strong> emulates Content Delivery Networks locally by intercepting requests, finding the required resource, and injecting it into the environment. This all happens instantaneously, automatically, and no prior configuration is required."
 website="https://decentraleyes.org/"
 forum="https://forum.privacytools.io/t/discussion-decentraleyes/269"
 gitlab="https://git.synz.io/Synzvato/decentraleyes"
@@ -55,7 +55,7 @@ opera="https://addons.opera.com/en/extensions/details/decentraleyes"
 {% include cardv2.html
 title="Terms of Service; Didn’t Read: Be Informed"
 image="/assets/img/addons/tosdr.png"
-description="<strong>Terms of Service; Didn’t Read</strong> “I have read and agree to the Terms” is the biggest lie on the web. This addon aims to fix that by grading websites based on their Terms of Service agreements and gives short summaries."
+description="<strong>Terms of Service; Didn’t Read</strong> is an addon that aims to fix how “I have read and agree to the Terms” is the biggest lie on the web by grading websites based on their terms of service agreements and privacy policies. It also gives short summaries of those agreements. The analysis and ratings are done transparently by a community of reviewers."
 website="https://tosdr.org/"
 forum="https://forum.privacytools.io/t/discussion-terms-of-service-didn-t-read/270"
 github="https://github.com/tosdr/"