Add new Cols-based methods.
Remove unused ColumnSelection code.
Delete unused code.
Merge branch 'master' into topic/cols

Conflicts:
	modules/pframe/src/main/scala/pellucid/pframe/Frame.scala
Clean up Rec constructors.
WIP: blah
Merge remote-tracking branch 'upstream/master' into topic/cols

Conflicts:
	modules/pframe/src/main/scala/pellucid/pframe/ColumnSelector.scala
Generalize Cols code to be re-used in Rows.
Use AxisSelction for Cols.
Move AxisSelection type member to type parameter.
Add some helper methods to Cols/Rows.
add denseValues method to Series

- method to access just the values of a series (ignoring non values if the series is sparse).
- add scaladoc for this and the `keys` and `values` methods
Merge pull request #21 from dwhjames/topic/denseValues

add denseValues method to Series
add mirror project to compile against scala 2.10.4 and Play Json 2.2.3

framian-json-play artifact is now compiled against Play Json 2.3.1 for both Scala 2.10.4 and 2.11.1.
framian-json-play22 artifact is a special case just to support play 2.2.x a little longer
Merge pull request #20 from dwhjames/topic/play-json-cross-build

add mirror project to compile against Scala 2.10.4 and Play Json 2.2.3
Merge remote-tracking branch 'upstream/master' into topic/cols

Conflicts:
	framian-json-base/src/main/scala/framian/json/JsonExtractor.scala
	framian/src/main/scala/framian/ColumnSelector.scala
	framian/src/main/scala/framian/csv/CsvRowExtractor.scala
	modules/pframe/src/main/scala/pellucid/pframe/Series.scala
First pass at better CSV parser.
Csv -> Frame support and bug fixes.
Merge branch 'topic/stats' into topic/demo

Conflicts:
	framian/src/main/scala/framian/RowExtractor.scala
Get asArrayOf, asListOf, etc working correctly.