Safely checking file paths in postbuild.exe

Maxpath in the CLR is 260 characters.  (http://stackoverflow.com/questions/3406494/what-is-the-maximum-amount-of-characters-or-length-for-a-directory) 

Unfortunately my project has some absurdly long paths and the post build step was throwing errors on those paths/files.  I don't need those files, so this pull request simply skips scanning directories/paths that are too long.  Also writing to the console in case anyone is running it from the command line.