fstplyr 0.1.2.9000

- `as.data.frame()` now works on `tbl_fst` objects (#8).

- Fix endless recursion in `groups()`.

Deploy from Travis build 4 [ci skip]

Build URL: https://travis-ci.org/krlmlr/fstplyr/builds/327224700
Commit: 2d35221

rename to 0.1