Fix Unhandled WebException

This commit fixes an unhandled WebException that may occur when
attempting to connect to the Minecraft session server when it is very
slow or unreachable.
Merge pull request #22 from justcool393/Indev

Fix Unhandled WebException
Added credit to contributors instead of email adress
BouncyCastle reference is still there
+ Made MCC commands ignore case.
+ Started executing script when called with "/exec <scriptname>"
Merge pull request #25 from bearbear12345/Indev

Indev
Find automatically a translation file from MC 1.7+

Load a translation file if Minecraft is installed on the computer
First attempt of MC 1.7 Server Ping ping packet

Currently not working, see MinecraftCom.cs & comment "STUCK HERE"
Server list ping packet done

(+) Thanks dogwatch for pointing out the mistake in int->varint
converter !
Offline mode done, TODO: online mode

Offline mode should be working now.
Fix for username causing login to fail
Online Mode done, 1.7 compatibility should be OK

+ Fixed chat colors because of 1.7 changes
+ Some code cleanup here and there
Fix for kick messages : now decoded from Json
Support text pasting with Ctrl+V
Fix for chat translation rules

Eg: achievement messages are now properly displayed
Fix for text coloration

- Recursive text coloration (like in MC 1.7)
- Fix for color bug introduced in 7e8b750
Fix for respawning + /respawn command

- Player is automatically respawned when logging in
- Added /respawn command (MC 1.7 does not fail to respawn)
- Cleaned MCC command handling code, /exec is now /script
Scripting bot : automatically find script file

- Automatically look for script file in config/ and scripts/ folders
- Automacically try to add '.txt' extension to the script filename
- Eg "/script testscript" properly loads "config/testscript.txt" script
Removed "You are dead" ingame message

- Death detector didn't work anyway, stats packet is not sent on death
- Could sometime crash the app due to a "VarInt too big" issue
- Note: "health upade" packet is also not sent by the server
Automatically download en_GB.lang from Mojang

- Removed en_US.lang checking since it does not exist anymore in assets
- If Minecraft 1.6+ is not installed, download en_GB.lang from Mojang's
servers