Fix y axis height and show negative numbers.

Fixes #364
Merge pull request #365 from MastodonC/feature/negative-number-charting

Fix y axis height and show negative numbers.
move to 'official' release of liberator.
user selects whether aliases in use.
Fix failing test.

Introduction of Unit in columns-in-order needed more work.
Make file parsing with mixed line endings better.
url encode/decode ids.
0 pad dates so they always parse as longs
Fixed docstring.