Page format A5 and A0 added and support of property "extra"
Page size A5 and A0 added in selection list.
Merge branch 'Dbk-Print-Java' of github.com:escheper/flamingo into feat/print-extra-information
Extra API methods for registering and unregistering other components to/from the Print component for getting extra info from other components
PrintExtraInfo.java added: wrapper for storing the extra info. Print component removes all (not only the first) occurences of the given component from the list.
Merge pull request #228 from flamingo-geocms/feat/print-extra-information

Feat/print extra information