fix css_grammar compile error with boost 1.56 - close #2366
adapt to ptree change in boost 1.56 - closes #2365
adapt to new rtree interface in boost geometry >= 1.56 - refs #2367
tests: fix postgis/pgraster tests if lack of connection
Add mention of CartoDB support in pgraster input plugin code
Merge pull request #2372 from strk/2.3.x-pgraster-credit

Add mention of CartoDB support in pgraster input plugin code
MinGW support for SConstruct script. Build now properly detects MinGW and finds dependencies correctly.
Properly Initialize mingwbuild variable.
Added singleton unit test to check for multiple instances across multiple dynamic libraries.
Updates for supporting 64bit MinGW build on Windows 7+ via GNU tools.
Final MinGW 64 bit enhancements for Windows 7+ and Server 2008+
Final MinGW 64 bit enhancements for Windows 7+ and Server 2008+