Add updateuser callback #152

[stijn-ringeling]

I did change the full name to email. The updateUser does not require a full name.

[arandr]

Thank you for the update. I have a few comments, but they're mostly merge errors I believe.
I'm not sure why you would want to store the sessionId in shared preferences. The sessionId expires after a (ideally short) time, so you don't need persistent storage for it. The password makes more sense but it is somewhat sensitive information (but I guess storing it that way is necessary if we don't want the user to have to login manually every time they restart the app).

Also, changing the way you stored the sessionId means you need to update it in the saved chars activity (you may have missed it while merging).

In addition, I just tested and at the moment signup doesn't return the sessionId, so we do need to make a login call after the signup one.

[stijn-ringeling]

@arandr I pushed a new commit containing updates concerning your coments. The sessionId gets saved in a sharedPreference so other activities like the settingsActivity can use it. I fixed the crash on login by adding the sessionId to the user object.