Drop PCRE dependency.

The config file is now manually parsed instead of using regex.
While this is less beautifull, it allows us to drop PCRE
as a dependency on Windows.

cmake/modules/Makefile.am

@@ -2,6 +2,5 @@ EXTRA_DIST = \
 	COPYING-CMAKE-SCRIPTS \
 	FindLIBUSB.cmake \
 	FindPCSC.cmake \
-	FindPCRE.cmake \
 	UseDoxygen.cmake \
 	LibnfcDrivers.cmake