Update README.md

Update README.md

Fix some links in table of content

Move many libraries and bindings to relavant sections

Removed duplicates:

- opengl-ada
- ada-nanovg
- ada-base
- ada-net-framework

Added new projects:

- AXMPP
- dcf-ada
- weechat-ada
- weechat-canberra
- weechat-emoji

Renamed some sections:

- "Networking" to "Networking and Communication Middlware"
- "Multimedia" splitted to "Computer Graphics", "General Purpose Computing",
  and "Sound"
- "Encryption, hashing, encoding" to "Cryptography"

Created new sections:

- Terminal User Interface
- Compression
- Chatting and Communication
- Robotics
- Linux and POSIX
- Windows and .NET

Merge pull request #58 from onox/patch-1

Move many libraries and bindings to relavant sections

cleanups

missing periods

Use GitHub mirror for Smart_Pointers

The original link to the Smart_Pointers library is dead ("Host not found"). Change it to the GitHub mirror of the Alire project.

Merge pull request #59 from senier/patch-1

Use GitHub mirror for Smart_Pointers

added FLTK Ada

Merge pull request #60 from thindil/patch-1

added FLTK Ada

Format new FLTK entry description (period)

Added Radalib

Merge pull request #61 from mgrojo/master

Added Radalib

Update README.md

Remove references to "christ-usch-grein" projects

All requests for documents under
"http://www.christ-usch-grein.homepage.t-online.de/" return a 404 Not
Found error.

Remove duplicate "increment" entry

Move `ada-toml` to the "Format Readers and Writers" section

Assuming that the "Parsers, Scanners, Linters, Analysers, Interpreters
and Prettyprinters" section is about programming languages, the "Format
Readers and Writers" section is better suited for `ada-toml`, as TOML is
a file format to represent structured data (not code), like INI.

Fix a typo