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/windows10.html

@@ -80,7 +80,7 @@
 <h3>Related Information</h3>
 
 <ul>
-  <li><a href="https://privacy.microsoft.com/en-us/privacystatement">Microsoft Privacy Statement</a> - Microsoft collects, uses and discloses personal information as described here. This allows One Drive data, Cortana searches and MS browser history to be sold to third parties.</li>
+  <li><a href="https://privacy.microsoft.com/en-us/privacystatement">Microsoft Privacy Statement</a> - Microsoft collects, uses and discloses personal information as described here. This allows OneDrive data, Cortana searches, and MS browser history to be sold to third parties.</li>
   <li><a href="https://support.microsoft.com/en-us/help/4468233/cortana-and-privacy-microsoft-privacy">Cortana and privacy</a> - To personalize your experience and provide the best possible suggestions, Cortana accesses your email and other communications and collects data about your contacts (People), like their title, suffix, first name, last name, middle name, nicknames, and company name. If you call, email, or text someone or they call, email, or text you, Cortana collects that person’s email address or phone number.</li>
 </ul>
 
@@ -89,7 +89,7 @@
     <div class="col-md-6">
       <h3>Some good news</h3>
       <ul>
-        <li><a href="https://github.com/crazy-max/WindowsSpyBlocker/releases">WindowsSpyBlocker</a> - Open source tool that blocks data collection.</li>
+        <li><a href="https://github.com/crazy-max/WindowsSpyBlocker/releases">WindowsSpyBlocker</a> - Open-source tool that blocks data collection.</li>
         <li><a href="https://www.ghacks.net/2015/08/14/comparison-of-windows-10-privacy-tools/">Comparison of Windows 10 Privacy tools</a> - ghacks.net</li>
       </ul>
     </div>