Improvements to calculated fields.

- Calculate last x months from the last timestamp not from today's date.
- Refresh ES after each calculation
- Better parsing of summary stats.
Merge pull request #346 from MastodonC/feature/improvements-to-calc-fields

Improvements to calculated fields.
Upgrade cljs to latest stable version.
Merge pull request #347 from MastodonC/feature/upgrade-cljs

Upgrade cljs to latest stable version.
Make calc type first item in a key.
Merge pull request #348 from MastodonC/feature/cljs-keyword-bug-workaround

Make calc type first item in a key.
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.