Information on how to debug Vala programs
Add option for conditional compilation
Fix typo in documentation
fix ARGS_DIRECTORY handling

- use get_filename_component to get the absolute path of the directory
  specified by the user.
FindVala.cmake: fixed incorrect valac-executable names
UseVala.cmake: now generating a normal vapi instead of an internal vapi
Merge pull request #6 from Richard-W/valac_names_fix

FindVala.cmake: fixed incorrect valac-executable names
Merge pull request #2 from ppareit/master

Information on how to create debug build
Merge pull request #3 from Mic92/master

Add option for conditional compilation
Merge pull request #4 from grimmy/master

Fix ARGS_DIRECTORY handling
Merge pull request #7 from Richard-W/no_internal_vapi

UseVala.cmake: now generating a normal vapi instead of an internal vapi