reworked package managemnt, added homebrew support, cleaning code
improved error handing, more brew commands
reworked requirements/dependencies
reworked upgrade notes
remove old requirements code
fix opensuse requirements function name
add sudo warning for the package installation message
Merge branch 'master' into features/improved_dependencies
Merge branch 'master' into features/improved_dependencies
fix requirements spelling
fix detection brew tap's on OSX
detect osx gcc-4.2 after installing requirements
improved code for opensuse requirements
fix requiremnt typo, improved opensuse and osx_homebrew installation,
extract common packages handling code
uppgrade package checking on osx brew
extract brew requirements to osx_brew
add a check if cellar is writable for osx homebrew
fix osx requirments missing do
Merge branch 'master' into features/improved_dependencies