hanlde session start explicitely in services
set schema public explicitly, sometime required with PG 9.2
move session starting code to GCService. Fix some errors introduced, when filtering transparent parameter
explicitly start session in services
explicitly start session in services
construct URL more correctly
fix bug when handling filters
add option to emulate public map. Useful, when while configuring maps
add option to emulate public map. Useful, when while configuring maps
some cleanup
minor cleaning
handle empty filter