Initial setup, still debugging.
Added test-enabled to gitignore.
Reshaped tree to match test-install layout.
Reworked symbolic link targets.
Added masked runtime case.
Added tests for:
* invalid service
* runtime enabled service
* static service
* masked static
* runtime masked static
Added the unit_file_get_list return fix.
Added reconciliation between unit_file_get_list and unit_file_get_state to test.
Added test/test-enabled-root components to EXTRA_DIST.
Merge remote-tracking branch 'origin/test-enabled' into enabled-cache2
Updated test-enabled to EnabledContext api mods.
Fixed bug in test-enabled.