libgst: Fix compilation on FreeBSD in regard to environ

2013-12-14  Holger Hans Peter Freyther  <holger@freyther.de>

	* configure.ac: Check for environ with AC_CHECK_DECLS.

2013-12-14  Holger Hans Peter Freyther  <holger@freyther.de>

	* cint.c: Fix the compilation on FreeBSD.
stinst: Add a pool look-up test for GNUPlot.GNUPlot like conditions.

2013-12-19  Holger Hans Peter Freyther  <holger@moiji-mobile.com>

	* PoolResolutionTests.st: Add TestDefaultPoolResolution>>#testDoubleName
	* STSymTable.st: Add PoolResolution>>#addPoolFirst: and override it
	in ClassicPoolResolution and DefaultPoolResolution.
stinst: Resolve GNUPlot.GNUPlot properly

Importing the Cairo and GNUPlot (probably other packages too) failed
because of GNUPlot.GNUPlot was looked up wrongly in the current
namespace. Add the current Namespace in front of all the other pools.

2013-12-19  Holger Hans Peter Freyther  <holger@moiji-mobile.com>

	* PoolResolutionTests.st: Add TestDefaultPoolResolution>>#testDoubleName
	* STSymTable.st: Add PoolResolution>>#addPoolFirst: and override it
	in ClassicPoolResolution and DefaultPoolResolution.