Reorganize the code into separate files#24

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dabit wants to merge 6 commits intordp:masterfrom

dabit:reorganize

Commits on Aug 12, 2013

Get rid of Jeweler
David Padilla
committed
Extract Gnuplot::Plot to its own file
David Padilla
committed
Extract Gnuplot::Splot to separate file
David Padilla
committed
Extract Dataset, Array and Matrix to their own files
David Padilla
committed
Reindent and clean the code
David Padilla
committed
Get rid of RbConfig warning while testing
David Padilla
committed