Under MacOSX, generate an Info.plist
Generate an icns icon on Mac OSX
On Mac OS X, write colobot.ini and savegames to Application Support directories
Abstract the definition of DataPath to CSystemUtils
On MacOSX, define the DataPath as being the Resources path in the bundle
On MacOSX, don't cache the Data, Sound and Music paths

As users can potentially move the bundle around, it doesn't make sense to cache these

(It would probably make sense to drop this caching on all architectures, but it's only on MacOSX where it hurts most)
Abstract the definition of LangPath to CSystemUtils
On MacOSX, define the LangPath as being i18n in the Resources path of the bundle
Add MacOSX bundle-specific installation paths
Don't set rpath if libCBot is compiled statically
On MacOSX, install files to Bundle-specific directories
Abstract the fetching of locale name to CSystemUtils

On MacOSX, get the preferred language
Add MacOSX Bundle and Windows NSIS installer

- Add two images from screenshots or existing data textures to brand the NSIS installer
Update the MXE install README to document the creation of the installer
WIP: Add INSTALL file for MacOSX