Changes to ChronosUI for SignUpPanel
create Database.getDatabase() for getting default database
update .gitignore in GUI project

Also, don't put gwt log under version control.
factor out login view, set up entry point for multiple views
Changes to chronos view class
Added RPC class , IPublisher interface, and ISubscriber interface. 
Changed name of ChronosView to SignUpView and modified.  Other changes
to previously exisiting classes
Added RPC Method to SignUpView to allow handling of user signing up. 
Added AccountAdd,EventAdd,AccountAddAsync, and EventAddAsync classes.
Merge branch 'master' of git@github.com:cdavis17/Chronos.git

Conflicts:
	ChronosUI/.gitignore