Merge pull request #17 from mburger/master

quick fix for opentsdb 2.x
Fixed regression that broke maximizing dashboard widgets
Interface tweaks for the navbar
Interface tweaks for the login and home screens
Fixed typo on home screen
Updated auth to allow multiple backends with fall-through, e.g. LDAP then MDB2
Fixed stupid regression that snuck through after testing
Fixed a couple of small annoyances causing PHP log messages
Added fix to disallow auth on duplicate usernames for multiple auth methods
fixed version number for 0.6.2...
Fix issue with maximizing dashboard widgets
sigh, forgot to update version number again
Refactored for better sanitization of database inputs
Changed downsampling and interpolation defaults for more accurate graphs out of the box
Set new downsampling and interpolation defaults for graph widgets too
Fixed regression introduced with interpolation default change
Fixing the last fix...
Initial new legend functionality
Completed new legend display for ad-hoc searches
New legend display for graph widgets