Refactor AccountIDs

Created SipAccountID and JabberAccountID from wizard registration
objects(work in progress).
Multiple fixes

Restores use of rememberPassword field. Refactors
SecurityAccountRegistration. Fixes default properties keys. Updates
libjitsi to version that works on Android.
Merge master
Adds debug target
Adds few default properties for SIP protocol
Prints stack trace for error which occurred during protocol sign in
The same instance of registration object will be used for one account edit. Before that the other was used to fill the forms and another to commit changes. That caused account properties not included in UI forms to be lost.
Makes StunServerDescriptor serializable(required for Android)
Fixes refactoring error which caused "remember password" checkbox to be not initialized in case there is no password.
Fixes bug with "no UserID provided" message when trying to register Jabber account using the initial wizard. Fixes problem with protocol name being overwritten by registration object's store properties action(refactoring error).
Fixes default boolean properties parsing.
Fixes SIP optional contact list properties handling.
Inserts protocol property for correct custom SIP providers handling(ippi wizard, sip2sip wizard and so on)
Removes the null check against keep alive method that prevents from editing it even in normal SIP accounts.
Fixes problem with password not being unremembered caused by previous commit with the same registration instance used for loading to and from UI forms causing ENCRYPTED_PASSWORD to stay even if password was removed.
Initializes rememberPassword field. Reads OPT_CLIST_PASSWORD from credentials storage. Adds few default properties to be included in newly created SIP accounts.
Few refactoring fixes in Jabber registration object. Moves STUN and Jingle nodes removal from Jabber protocol factory to registration object.
Merge branch 'Android-settings'
Removes methods already declared in JabberAccountID from it's impl version. Reverts formatting changes. Removes unused import.