buildsystem: fix kdevplatform detection for kdevplatform >= 1.6

Should fix issue #20 ( KDevplatform version detection will fail after kdevplatform 1.5.1 )
main window: do not call setupAreaSelector() on KDevPlatform >= 1.6.

The method has been probably renamed / removed.
Should fix #26.
fix compilation with gpsim >= 0.27

add a new define for gpsim 0.27, HAVE_GPSIM_0_27, with is used to detect the rename of the member W to Wreg in pic_processor class.
Merge pull request #28 from ktechlab/fix-compilation-on-kdevplatform-1.6

Fix compilation on kdevplatform 1.6