Handled a new parameter called "scope".

If scope is not given than the legacy account search is implemented
otherwise if scope is LDAP then the search is only in LDAP user base or
DB for local seafile db user base.
The returned JSON list now has also a "source" attribute about user
origin.
Corrected list initialization and return response for not a valid scope
value
pull translated files from transifex
Update source language to 3.1
Fix double % in source language bug
Merge pull request #258 from bits4beats/accounts_list_scope

Handled a new parameter called "scope".
fixed a bug in PR #258
[i18n] Updte to 3.1.1
[api2] Fix extracting email from user notification detail
Update captcha
Change login_failed_attempts to 3
[signup, passwd change] redesigned passwd tip, improved code; [file view] added tip for sidebar
Added index to user starred files
[file-edit] add filename as website title at file edit page
[file-edit] add filename as website title at file edit page
fixed excel file preview in shared links
update link of Contact-Us
Modify footer
Fix typo in personal wiki creation
[priv shared file view] 'save popup': sort libs, modified ui of buttons