Update .gitignore file
Actualize Linux prerequisites in README
Fix dependencies information for building deb package
Use dynamic loading for DX10 and DXGI

Issue: https://github.com/woodenshark/Lightpack/issues/4
Version bump (5.11.1), changes in installer script
Update deployment for Windows version

Change installer script according to recommendations from windeployqt
utility. Now we use Qt 5.3 for building for all platforms.