add tesseract test and test image
remove commented code
add todo comment
change interface to accomodate tesseract-exec engine
add support for exec engine
Issue #8 - experimenting with passing in args
Issue #8 uncomment
update processrequest()
TesseractEngineExec ProcessRequest() now works.
refactor code into factory method
rename c_flags vs config_vars
Issue #8 rename cflags -> configvars
add psm