Removed Squirrel.

This compiles under Windows, but is untested in Linux.
Removed squirrel from project includes
Removed squirrel mentions from makefile
Made player drowning implementation
Fixed up the wiki URL
Fixed the formatting issues in player cpp files
Made comments more readable by adding space between // and text content. Added /// doxygen syntax comments to declarations
Merge pull request #50 from ravenscroftj/feature/drowning

Made player drowning implementation
Merge pull request #49 from mc-server/RemoveSquirrel

Remove squirrel
Merge pull request #51 from mc-server/prtesting

Fixed up the wiki URL
cPlugin: Removed empty default implementation of virtual calls.
LuaState refactoring: using templates for hook function calls.

This simplifies calling Lua functions considerably, it's almost like calling a C++ function, only with an extra argument to delimit args from returned values.
cPlugin: Name now defaults to the plugin folder name.
cPlugin_NewLua is now completely rewritten to use templated LuaState calls.