Created build/release scripts for windows
Added build scripts for linux
Updated build scripts for windows
Updated linux build scripts
Modified linux build.
Changed "zip" to "tar.gz" in linux build, and added - to tar command line
build scripts:

- Updated default qmake path.
- Updated default parallel builds threads to more casual computer value.
Merge branch 'build-scripts' of https://github.com/CasparCG/Client into build-scripts
Merge pull request #127 from CasparCG/build-scripts

Build scripts