[ADD] module delivery_optional_invoice_line
[ADD] test/delivery_optional_invoice_line.yml
[IMP] Added description and changed the category
[IMP] Module description
[IMP] test/delivery_optional_invoice_line.yml
[FIX] Module decsription
[IMP] _prepare_shipping_invoice_line of delivery.py
[REM] key 'active' from the manifest file
Add .gitignore
Merge pull request #4 from tafaRU/adding_delivery_optional_invoice_line_7/master

[ADD] delivery_optional_invoice_line module v.7.0
add .travis.yml
add .coveragerc
fix flakes8
Merge pull request #5 from yvaucher/7.0-travis-corevage

Add CI config
Create README.md
For coverage, use branch specified png since svg can't specify branch names.
Merge pull request #8 from bwrsandman/proper_coverage_badge

7.0 - Coverage use png badge so it can specify branch
Update .travis.yml
Add LICENSE
Merge pull request #13 from yvaucher/7.0-license

Add LICENSE