Collapse Saturday and Sunday

Also fix broken collapsing code
Reindent most of the tests.

I like tabs, and I think these were like this mistakenly.
Merge pull request #60 from kotct/reindent-specs

Reindent most of the tests.
Change all the button names
Merge pull request #63 from kotct/fix-button-names

Fix #38
Merge pull request #64 from kotct/collapse-weekend

Collapse the weekend by default
Merge branch 'master' into prettiness-fixes