Macros, snippets, etc.

Changes:
* Simplified SQF.tmLanguage.
* Added highlighting of hex digits.
* Added firstLineMatch (// sqf) for a script files w/o extensions.
* Added frequently used macros, such as DIK_0, DIK_APOSTROPHE, private8 etc.
* Added sublime-completions for events names and config names for string.quoted.sqf scope.
* Added some snippets for event handling and loops.

I use this (https://github.com/DenVdmj/make-sqf-hl-schemes) lua script to update the highlighting schemes.