Merge pull request #42 from dozeo/fix_pkg_config_lite_download

Fix download of pkg config lite on Windows
Fixes installation of grabsend executable

The deployment location of the grabsend executable got fixed. There was no warning or error message in building the screengrabber project. If a previous build contained grabsend in install dir, everything was fine.
Merge pull request #43 from dozeo/fix/grabsend_deployment

Fixes installation of grabsend executable
Deployment of grabsend differs on Win/OSX

On Windows a different location needs to be set than on OSX.
Merge pull request #44 from dozeo/fix/grabsend_deployment

Deployment of grabsend differs on Win/OSX
added zlib as a build dependency on windows
use dozeo zlib fork
removed external zlib dependency to setup internal one
remove dependency on external zlib project
updated dozeo/zlib to exclude artifacts generated by Makefile.gcc
modify commit to x264 that screengrabber depends on to reflect custom fix for windows header change; add check for forgotten submodule update on build dependencies
attempt to remove completely incorrect dependencies
hopefully fixed x264 dependency to use correct github repo and commit
re-added the zlib -> dozeo fork as dependency
removed dependency on external ffmpeg repo
re-added dependency on ffmpeg -> dozeo fork on branch with windows header fix
update project to use latest ffmpeg + x264 (subprojects not updated in this change yet)
Merge remote-tracking branch 'origin/dozeo-zlib' into new_build_process
small update on submodules (ffmpeg, x264)
fixed ffmpeg dependency