display page at Portal destruct, if not already displayed
  renamed $buildHasRun to $hasDisplayed in Engine class
  added ob functions to capture stray text and add it to the page block
  renamed _Render() to _echo()
removed genericRender() function
rewrote getPage() function to use defines and a new private setPage() function
added getPageObj() function
some fixes and cleanup to LoadPage() function of Page class
added $sepBefore and $sepAfter boolean arguments to trimPath() function in Utils_Files class
making use of Utils_Strings class in SanFilename() function

git-svn-id: http://prositemanager.googlecode.com/svn/trunk@67 e374cdb8-7ee8-0d77-fd1e-c554042f9154