Event system rewriting, EventManager partially implemented

cellAudio partially rewritten, some bugs fixed
Merge pull request #67 from Bigpet/master

change submodule to DHrpcs3
Merge pull request #68 from Bigpet/master

Remove the outdated gl.lib reference
Trying to fix merge conflicts...
Few bugs fixed and license file added

* Fixed GUI issues caused by the update to wxWidgets 3.
* Fixed small bug in SC_TTY (thanks Nukem9!)
* Added GPL v2 license file.
Merge pull request #70 from Nekotekina/rpcs3

and conflicts fixed.
Merge branch 'master' of https://github.com/DHrpcs3/rpcs3
log fixes (to wx_str())
Merge pull request #71 from Nekotekina/master

Log fixes
make stepping work again, it's impossible to use it without these changes