Add appAttach Apps Bundle

1. Modified .gitignore to allow for ap_ files

2. Uploaded /system folder structure and all assets for the apps:
DeviceManager
AccuWeather
Maxthon
iMediaShare
Despegar
Lookout Mobile Security & Antivirus
OfficeSuite
PlayKids
FreeZone Free WiFi
Opera Mini
Kido’z
SwiftKey

**note apps in aapreinstall folder will be automatically installed by
appAttach devicemanager app on first boot and after factory reset. This
is similar to Siragon's existing "aosp-script-preinstall" functionality.