pythonPackages.pytesseract: init at 0.2.5

Simple python wrapper for Tesseract, an OCR engine to detect and read
text from images.

See https://pypi.org/project/pytesseract/

pkgs/development/python-modules/pytesseract/tesseract-binary.patch

@@ -0,0 +1,13 @@
+diff --git a/src/pytesseract.py b/src/pytesseract.py
+index 32713cf..5f9209d 100755
+--- a/src/pytesseract.py
++++ b/src/pytesseract.py
+@@ -25,7 +25,7 @@ if numpy_installed:
+     from numpy import ndarray
+ 
+ # CHANGE THIS IF TESSERACT IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
+-tesseract_cmd = 'tesseract'
++tesseract_cmd = '@drv@/bin/tesseract'
+ RGB_MODE = 'RGB'
+ OSD_KEYS = {
+     'Page number': ('page_num', int),