Add debug output with command lines of started processes

Rewrite the code which starts up the android emulator

Fix wrong parameters given to the AndroidEmulatorService

Fixes http://teampulse.telerik.com/view#item/274475
Merge pull request #451 from Icenium/totev/android-emu

Fixed starting of the app inside the Android Emulator
Updated rel notes for the hotfix
Merge pull request #456 from Icenium/ab-251

Updated rel notes for the hotfix
Version bumped to 2.5.1
Merge pull request #457 from Icenium/totev/v251

Version bumped to 2.5.1
Merge branch 'release' into totev/merge-release
Merge pull request #459 from Icenium/totev/merge-release

merge release into develop