Document fixes

Some podoc updates.

Have validation tests

Validation tests implemented. Bugs uncovered by validation tests fixed.

0.1.3-alpha

Bug fixes.
See issues #37, #38, #39, #42.

0.1.1-alpha pre-release

Minor bug fixes to 0.1-alpha.

• Add scale parameter to uniform flow.
• Fix crash when using simply connected domain for dipole.

See issues #24, #28, #29, #35 and #36.

First (pre)release

We'll call this "stable enough" for first alpha release. Development continues.