added Paths class - moved functions from Portal class
added forceStartsWith() and forceEndsWith() functions to Utils_Strings class
added findFile() and fineFileContents() functions to Utils_Files class
write new code for tplFile::LoadFile() using new library functions above
started adding site/page title
removed some old code

git-svn-id: http://prositemanager.googlecode.com/svn/trunk@76 e374cdb8-7ee8-0d77-fd1e-c554042f9154