Fix#531 (Enforce Population Limit), based on patch from evans.
Empty training queue and refund resources when buildings are destroyed
or captured.
Specify Cost defaults in XML instead of JS, to simplify some code.
This was SVN commit r8014.
Add RelaxNG schemas for all current components.
Add -dumpSchema command-line option to dump the combined entity schema.
Add a Perl script to validate entity templates against the schema.
See #413.
This was SVN commit r7452.
Merge from 22b478ffed8d.
Pure scripted interface definitions.
Entity creation from scripts.
Improved messaging system.
Messages on entity deletion.
Basic player entities.
Player ownership.
Bug fixes.
This was SVN commit r7281.