write_dvb_sub(): Test for out of bounds and report details when this happens. Still doesn't fix the underlying issue but will help figure it out.
ocr.c: Solve malloc()/delete[] combinations that happened when operating on tesseract output. Now a malloc()'ed copy is immediately made, tesseract's results are unallocated using tesseract's delete function, and we continue using our own copy which is later free()'d.
* Implementation of text renderer
* Fix some characters being cut
* Fix encoding and other bugs
* Add black background & fix bugs
* Fix more bugs
* Change to relative path
* Add a font option & Default font for MacOS & Fix anti-aliasing
* Document -font & enlarge default canvas
- Adds a open-source hashing lib for SHA2 (SHA-256, SHA-386, SHA-512)
from http://www.aarongifford.com/computers/sha.html, with some small
modifications to make it work unders windows too
- Updates build commands to reflect this change
