mock out some lines-based extraction
use do ... end for all multiline blocks instead of curlies
Merge branch 'doend' into tabledetection
scale! method and various location helper methods on segment
do ... end
explanatory comment
add find_lines helper method
fix bounding box
optionally, detect vertical ruling lines and divide text by those
helper method to not have to redo javacv stuff if you're detecting lines and rectangles