Generalize Cols code to be re-used in Rows.
implement reducer tests as scalacheck properties
Use AxisSelction for Cols.
Move AxisSelection type member to type parameter.
Remove Iterable and IterableLike from Series

- implement `filterKeys` and `filterValues` directly
- all call sites for `series.map`, `.collect`, etc rewritten it terms of `series.iterator`
- add size hinting to `SeriesBuilder`
- add overload to `Series.fromCells`
add convenience methods for reductions on Series

- add a convenience method for every reducer for basic reduce and reduceByKey
- remove ClassTag where possible
add denseIterator to Series

add a better iterator for dense series
Add some helper methods to Cols/Rows.
cross build for 2.10.4 and 2.11.1

- bump to sbt 13.5
- remove all plugins
- remove build fluff
- remove some resolvers
- build with shapeless full version for 2.10.4 and binary version for 2.11.x
- use play-json 2.3.0 for 2.11.x and 2.2.3 for 2.10.x
Add Apache 2.0 License
add license to README
convert README to markdown
Merge remote-tracking branch 'dwhjames/topic/2.11'
Merge remote-tracking branch 'dwhjames/topic/series-interface'
Merge remote-tracking branch 'dwhjames/topic/reducer-props'
add headers to source files
Merge remote-tracking branch 'dwhjames/topic/license'
the grand renaming!
add Travis CI config
Add Travis CI build status badge