Upgrade GLib dependency to 2.38
Add some remark about a translatable string
Add Anjuta project related files to .gitignore
Update note in tab_changed_cb()
Add function ag_chart_add_planets() to add all known planets to the chart

This is required for a readable aspect table
Add function ag_chart_get_planets()
Create GtkGrid for aspect table

This is a textual representation only. Icons are still on their way.