feature: when using LdapUserService one can configure Gitblit to fetch all users from ldap that can possibly login. This allows to see newly generated LDAP users instantly in Gitblit. By now an LDAP user had to log in once to appear in GitBlit.

feature: when LDAP user synchronization is enabled, one can configure GitBlit to delete all LDAP users from the backing user service that are no longer existent in LDAP. By now LDAP users that were deleted still appeared in the GitBlit user list.
significantly reduce write operations to backing user system.
Merge branch 'master' of https://github.com/gitblit/gitblit into enhancedLdap

Conflicts:
	distrib/gitblit.properties
cache results of LDAP user synchronization for a configurable amount of time (realm.ldap.ldapCachePeriod = 2 MINUTES)
Translation to Brazilian Portuguese
FIX: setting line separator back to Windows style
Update from upstream/master

Merge remote-tracking branch 'upstream/master' into translation_to_pt-br
Some language adaptions on pt-br properties
translation of lastest properties
Merge remote-tracking branch 'upstream/master' into translation_to_pt-br
Merged Brazilian Portuguese translation
Spanish translation tweaks
Fixed regression in repository cache wrt repo names with case (issue-172)
Fixed cache bug wrt create/edit repository with existing repo name (issue-172)
Added case-sensitive check for repository
Fixed regression in isFrozen (issue 181)
Update to JGit 2.2.0
Cleanup working folders for git servlet unit tests
Do not pass null email address to PersonIdent
Final documentation of 1.2.0 release