Return of the prodigal THUMBNAIL_FORCE_OVERWRITE

[haakenlid]

I couldn't find original commit (commit
eb569ad) mentioned in issue #351.

The commit didn't seem to be part of any existing branch in the repo,
and it's gone from the master branch.

[haakenlid]

The Travis CI build process seems to be broken at the moment.
I suspect it's because the .coveragerc file is no longer valid in the new version of coverage. http://coverage.readthedocs.org/en/coverage-4.0/changes.html

I've made a change to .coveragerc that I hope will make the tests run correctly with the new version. According to the docs, exclude_lines configuration is part of the [report] block. (http://coverage.readthedocs.org/en/coverage-4.0/config.html#syntax)

From the Travis error log https://travis-ci.org/mariocesar/sorl-thumbnail/jobs/84287368#L255
coverage.misc.CoverageException: Unrecognized option '[run] exclude_lines=' in config file .coveragerc

[mariocesar]

@haakenlid thanks I didn't notice will do a double check and then merge it again

[mariocesar]

@haakenlid crap ... :( I made a huge mistake trying to revert a commit, never will do that again

[mariocesar]

@haakenlid Sorry for the confusions on merging, your changes are in master now

[haakenlid]

Cool. 👍