Network model fix

Migration to set the ipv4router to varchar
Merge branch 'Fix-network-model' into wip
Fix for STRICT mode
Fix type errors on directory_service_model
Fix type for disk_report

Now works with mysql in strict mode
Added uncaught exception handler

Improved error messaging
Moved session initialisation from index.php to controllers

No session creation for client machines anymore
Merge branch 'session' into wip
updated spanish translation
Fix for Network migration

serial_number is not unique..
Removed session write check

Does not work on IIS.
Upgraded to Font Awesome 4.0.3

And updated all relevant views
Merge branch 'font-awesome-4' into wip
Updated moment.js to 2.5.1

Bugfixes
Add index to munkireport.serial_number
Better icon for reports
Add debugging info to table query model
Trim newline from localadmins
Merge pull request #77 from nbalonso/spanish-translation

updated spanish translation
Fix admin: add authorized call