Initial commit

- New custom RDD wrappers for Series, Images, and RowMatrix, as well as
a base class for shared methods
- Thunder Context loads data into the custom RDD wrappers
- RDD type specific loading interfaces for different kinds of data
Change source for RowMatrix
docstring and param checking for loadSeries
docstring and param checking for loadImages
make conf.json file name configurable via keywork arg
move FORMATS lookup into data module
Removed import aliasing

- Caused a dependency error
Fixed import error
fixes for circular import, should mirror upstream changes
temp: copy Parser into series module to avoid circular import
initial working test for series binary loader
Added base data methods
Made matrix extend series
Move parser to series
Move stats to series
Move isrdd to new common.py
Removed standalone stats tests

Will replace with separate tests for seriesStats
Added todo
Removed old import
remove unused import