Correcting Lightning instructions

The sample image shows a space between default and calendar, while old instructions suggested default%20calendar. In reality it's 'defaultcalendar' now.
Added Thunderbird Address Book sync instructions
more resources for angularjs learning
Merge pull request #123 from tuxick/patch-1

Correcting Lightning instructions
Merge pull request #129 from craigarno/thunderbird_sync

Added Thunderbird Address Book sync instructions
Update to recommend cron.
Add Issues section to Administrators Manual for bug triage information
Added backup information to manual
Add link to backup addition
Cleanup as well as add MariaDB as supported and recommend MySQL or MariaDB
remove apptemplate advanced notices
Add lock-tables to MySQL
Merge pull request #135 from mjkent/master

Various Cleanups for Documentation
Merge branch 'master' into stable5