Try to ease the selection around toolchains version upgrades
Merge pull request #27 from AlexandreP2101/develop

Try to ease the selection around toolchains version upgrades
Add make jobs configuration as argument
Merge pull request #28 from AlexandreP2101/develop

Add make jobs configuration as argument
Update software versions
Unset SHELL variable instead do it empty
Freetype need libpng.
Fix free type docs download
Update Qt Creator to 2.8.1
Qt-5.1.1 released!
Remove MSYS1 from readme. MSYS2 is only support now.
Add Qt-5.1.1 to help
Add patch for QTBUG-33155.
Fix building Qt-5.1.1 with recent mingw-w64 runtime.
Update using toolchains to gcc-4.8.1-rev5
Update poplar to 0.24.1
Update sqlite to 3.8.0.1
Fix QTBUG-33225 while building Qt-5.1.1
Fix latest Qt patch.
Fix downloading and configuring poppler.
Fix issue with installing empty .pc files.