Relese 0.3.6
Changes since release 0.3.4 includes:
- Update nom dependency to version 3.2.
- Update optional rsass dependency to version 0.5.0.
- Update base64 dependency to 0.7.0.
- A documentation typo fixed, by @jo-so.
- Minor internal cleanup.
Tested with rust version 1.18.0 (03fc9d622 2017-06-06), 1.19.0 (0ade33941 2017-07-17), 1.20.0 (f3d6973f4 2017-08-27), 1.21.0 (3b72af97e 2017-10-09), 1.22.0-beta.2 (a0a837c45 2017-10-20), and 1.23.0-nightly (d762b1d6c 2017-11-04).