Merge tag '0.8.1' into develop

bug fixes, scan_interval, skip preprocess
Fixed readme typo
Wrapped watch in exception handling so nothing should terminate it except ctrl-c
Added coveragerc
Modified todo
fixed some quoting of filenames for windows
fix backslash for windows in convert call
recent changelog file that gets autogenerated
Added threaded tesseract and preprocess execution
bumped version to 0.8.2
updated exe
Merge branch 'release/0.8.2'