Removed sqlite permissions check and debug handler

sqlite permissions errors now get caught by the appropriate Exception
handler, debug is now handled by alert()
Removed sqlite check from config_default
minor fix to get AD comments and dsconfigad data back
Add indexes to machine
Merge pull request #79 from nbalonso/bug-fix

minor fix to get AD comments and dsconfigad data back
Merge branch 'wip' of https://github.com/munkireport/munkireport-php into wip
Set global PDO Errormode to exception, rewrite table create
Fix nested transaction
Fixed schema number for machine, add alert for table creation
Better error handling for data tables ajax requests
Added Exception handling for report controller
Transactions don't work for create table in MySQL

Better to DROP the table on failure
Added accessors to Model class, alternative CREATE INDEX syntax
fixed down() for munkireport_add_unique_index
Munkireport model indexes fix
directory_service indexes
MySQL: add index to filevault_status
Add index to serial_number in install history
MySQL: add index to inventory model
MySQL: add indexes to network model