identify all supported tiff version by leptonica

git-svn-id: http://tesseract-ocr.googlecode.com/svn/trunk@931 d0cd1f9f-072b-0410-8dd7-cf729c803f20
move PERF_COUNT_START message below tesseract message; implement parameter to suppress test blob messages

git-svn-id: http://tesseract-ocr.googlecode.com/svn/trunk@932 d0cd1f9f-072b-0410-8dd7-cf729c803f20