initial implementation. Any valid user gets through
ssl redirection to prevent password leaks
adLDAP library cleanup
fixed typo on domain_controllers. Working now

Any valid AD user still gets through
limit access to allowed users
failed reason is now displayed at login window

should help troubleshooting
added back useful group function
including the library unaltered
fixed group based access
cleaned up some comments
fixed ssl redirection when the site is running from a subdirectory

tested on Apache 2.2 and 2.4 with auto-detect subdirectory and
hard-coded subdirectory in config.php
renamed mr specified variables

These values are not related to AD but only used internally in mr-php.
This should help avoiding any confusion
support for recursive groups and code cleanup

contribution by Arjen
fixed naming convention and adLdap admin variables
Merge pull request #56 from nbalonso/ldap-auth

Ldap auth #14