fixing warnings
bumping cmake minimal version
cmake: experiments with cpack
system: fixing build for MinGW
moving tasks from TODO to https://github.com/Kicer86/photobroom/issues
removing project() from all cmake files but top one
bumping cmake required version, setting version for broom
build fix for VisualStudio
cmake: removing package type for cpack
removing TODO file

all issues are now in https://github.com/Kicer86/photobroom
cmake: setting package version for CPack
cmake cleanups, information about 'package' target added
code cleanup
icons: main_ico: removing background and resizing all items
database: move IBackend to separate file
database: adding getPhotosWithHash() and getPhotoswithPath() to IBackend. Code cleanup
core: PluginLoader: warnings fixed
gui: ui: nicer texts
system: filesystem: path to translations
first polish translation