Added web protection folder option (GUI)
Added hooks for user module
Added hooks.d directory for installer/engine hook files
Allow to trigger more than one callback function for menus
Customer user toadd and delete tasks are now processed by engine
Domain module shouldn't be responsible to add i-MSCP unix user
Hide menus referring to unplayable features
Removed useless headers
Removed both order panel and billing interfaces
Rewritten Ftp account add page (GUI)
Updated Net_DNS to Net_DNS2 (version 1.3.0)
Web folder are now protected using immutable flag
Fixed #191: Defect - proftpd slow login
Fixed #377: Defect - Some issues with shared mount point
Fixed #458: Update - NET_DNS to NET_DNS2
Fixed #558: Defect - Unable to edit custom MX DNS records
Fixed #571: Bug - Proftpd - Unable to restart - Directive collision
Fixed #572: Defect - Shared mount point - Entity Deletion
Fixed #567: Bug - Shared mount point get deleted even if used by other entity
Fixed #631: Defect - Proftpd - Heavy 100% load on login / directorychange
Fixed #644: Task - Show specific dialog message when installer cannot run due to backup process
Fixed #646: Defect - Remote SQL server - The host part of SQL users as created by i-MSCP should be settable
Fixed #740: Enhancement - Engine Hook for post domain user creation

Refactoring + several fixes + typo