Created AgWindowError quark for later use
Created save-as dialog
Enabled XInclude for XSLT stylesheets
XSLT stylesheet is now loaded directly from file

Reading from memory kind of disabled XInclude possibility. Included
files must have been loaded one by one, which is a bit out of control.
Changet chart.xsl to use xinclude instead of built-in sign symbols
Moved run_action() and application_activate_cb() to ag-app.c
Sanitized action callback function names
Added hotkeys for tab switching

The hotkeys are the same as in Placidus, as the original Astrognome didn't
have any.
Changed readme to reflect finished features
Header bar and web view now correctly resize with the window
Added a dispose function to AgWindow
Made GVariant fetching code simpler
Added a required parameter to get_by_xpath()
Made country and city values optional in save files

The <country> and <city> tags are still required, but may be empty
Uncrustified sources

Also, added astrognome-uncrustify.cfg for later use
Removed unneeded lines from configure.ac
Created GSettings schemas
Created AgSettings object to deal with GSettings
Now restoring window settings (size and maximized state) from GSettings
Uncrustified new code