Recursive finding of django templates

Accept multiple arguments instead of just one. If an argument is a
directory, recursively find all html and txt files within.
Merge pull request #3 from izidormatusov/master

Recursive finding of django templates
Added GPLv3 licence
added copyright notice
Rename to valid folder name
Recursive 'all templates' by default
pep8 fixes
Packaging fix, version bump.
Fix author's email address
Dual licencing this under GPLv3 and BSD
add exclude flag and some additional regexes to exclude strings that shouldn't be translated
fix the regex and add option to overwrite old files
Merge pull request #6 from pegler/master

Exclude flag and more regexes
make work if there are no excluded files listed
rearrange
split into main method
refactor to make more function
unittests
refactor and genericise unittests
more tests