added FORCE parameter to enable checking all preprocessor configurations
use target's INCLUDE_DIRECTORIES property to pass include directories to cppcheck
Update README.markdown

Elaborate on subtree, change example code to use CMAKE_CURRENT_SOURCE_DIR
Merge pull request #27 from inolen/master

cppcheck improvements (target include directories and --force support)
Fixes to DoxygenTargets.cmake

Makes it work properly on windows (again)
Merge remote-tracking branch 'upstream/master'