Add a function to enable tesseract stdin and stdout argument parameters

[andyvuong]

Introduces a new function processStream() that pipes read streams into a child process executing the tesseract binary. Process() is unchanged to keep any backwards compatibility. Included a test case as well.

Usage:

  tesseract.processStream(stream, options, callback)

[andyvuong]

The wercker configuration appears to be using an older release of tesseract (3.02) that does not support the 'stdin' parameter hence why the test is failing. Tesseract 3.03 or above is needed for this feature. I can't do anything on my end to modify the wercker set-up.

[reecefenwick]

Great work with this!

Would it be worthwhile updating the README with an example, and point out that this feature requires at least version 3.03 of tesseract

[andyvuong]

Yes updating is always worthwhile! Thanks.