Rename: gittip => gratipay
Require openpyxl < 2.1.0 due to deprecation bug
Bump version number
Merge branch 'hotfix/v0.8.2'
Merge branch 'hotfix/v0.8.2' into develop
Bump development version number
'new' => 'create'

Fix #162
Fixed VCS relative paths

Relative paths should be relative to the current directory, not
relative to the root of the working copy. Also, ‘-r’ was added to the
Git remove command to allow directory recursion.

Fixes #163
Update CHANGES
Exclude openpyxl==2.1.0 as a dependency

openpyxl==2.1.0 broke tests (see #161). In openpyxl==2.1.1 these tests
are no longer broken so the old dependency requirements were restored
with an exclusion of the broken version.

Fixes #161
Bump release version number
Merge branch 'hotfix/v0.8.3' into develop
Skip setup when not running integration tests
Merge branch 'develop' into feature/custom-css