oc-rtf: Don't crash when we don't know the specified font
oc-rtf: check valid font name when generating <font> tag
Merge pull request #31 from Zentyal/jgarcia/fix-rtf-parser-invalid-font

Don't crash when we don't know the specified font
oc/util: Tune dbmsgreader for new caching classes names
oc: Set log level to 0 in samba-get-config script - it is very chatty during builds

This script is very "chatty" when "log level" is set to a high number
(usual scenario on developer machine)
oc: Make sure we always use NSString keys in 'messages' dictionary

Different types for keys in Dictionaries leads to not finding
expected entry - we should make sure that everythime we set/get
entry from a dictionary, key object type is same
oc/MailFolder: Add more logging so we can trace invalid message kyes