Merge branch 'master' of https://github.com/rahilwazir/Ticket-management-system

merging
added assets; created bootstrap controllers;
added ajax controller
removed codesleeve package
separate ajax content; page error handling; improve js pushstate;
added user management
add user management module
Merge branch 'features' of https://github.com/adeel-raza/ticket-management-system into features