Added option to allow relative links

[codecov[bot]]

Codecov Report

Merging #17 (33b3f42) into master (bb2a291) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #17   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          103       103           
  Branches        20        20           
=========================================
  Hits           103       103           

Impacted Files	Coverage Δ
django_bleach/utils.py	100.00% <ø> (ø)

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[marksweb]

Could you please add some content to this PR to (at least) explain what it includes.

I have now added a PR template which might help you with what to include;

# Description

Describe:

* Content of the pull request
* Feature added / Problem fixed

## References

Provide any github issue fixed (as in ``Fix #XYZ``)

# Checklist

* [ ] I have ran `tox` to ensure tests pass
* [ ] Usage documentation added in case of new features
* [ ] Tests added / I have not lowered coverage from 100%

[marksweb]

@azaitsev it'd be good to get this merged. Can you take a look at the conflict please?

[Laityned]

allow_relative support is dropped by bleach in 2013 but there README is not up to date.

[marksweb]

Thanks @Laityned

In that case I'll close this.