Merge pull request #1 from Negusbuk/master

added .gitignore files
Merge pull request #2 from Negusbuk/master

fixes for OSX and cleanup of .gitignore files
added QtCreator-specific project config files
added QtCreator-specific project config files
added functionality to send twitter messages from a script
Merge remote-tracking branch 'upstream/master' into osx_no_opencv