Added eclipse settings under build/eclipse and Makefile

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13436 b35dd754-fafc-0310-a699-88a17e54d16e
Moved all date parsing and formating to util.XMPPDateTimeFormat and made it more robust.

Fixes OF-600: XEP-0082 defines the fraction of seconds to be optional in a date format. Fallback to this if the first parser could not parse the date format.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13437 b35dd754-fafc-0310-a699-88a17e54d16e