add new LDAP backend
- authenticate user against ldap via user bind
- if user not already exists in baikal, create internal user
correct author and describtion
- remove debug output
- write default getAccountValue, returned empty array -> use username as displayname and email (if it one)
make implementation more general
- autocreation can disabled
- optional realm
- add new auth-type ldap-userbind
- replace hardcored values with defines
extend configuration gui for ldap-userbind
catch stacktrace from failed ldap_bind
add placeholder popover
remove debug_log entry
Merge pull request #1 from InuSasha/master

Merge IMAP Auth