UA refactor to new Android API
Replace KurentoException with KurentoSipException & fix CREGISTER errors
Clean project
Add base implementation of register

Register, unregister and reregister.
Add bin/ dir into .gitignore
Update maven dependencies
Initial incoming and outgoing calls implementation
Clean source code
Add ACK and BYE SIP support
Crate default handlers in SipUA
Complete timeout process
Implement SIP Cancel
Delete old TODOs
Update groupId name and version in pom
Use defaultSharedPreferences
Add .gitreview to project

Change-Id: Ie3305e77a1155a3609a1e60ce42b6dc38e9019c8
Convert project to apklib

Change-Id: Ifc73c7e2a3b1c86ab333b8423a6f1116b50a3953
Start using preferences from android strings in preferences.xml

Change-Id: I4639227cf08e6e02a0eb00460bc0018691e5c46d
Update preferences management

Change-Id: I10f4d472eadd789224e1d987dce4f6a4db500370
Do not terminateCall in CBye

This way a proper call termination code can set calling to terminateCall

Change-Id: I9e312eb86ad57c7b6f7cbc87c98422b3af71805a