Declare accessors

Declared all three accessors and implemented getRow.
Implemented Accessors

Implemented getColumn and getBlock accessors. fixes #14
Merge pull request #17 from DavidGinzberg/master

Fixing out-of-sync gh-pages branch
Merge pull request #15 from DavidGinzberg/Accessors

Accessors
Minor fix

newline and other minor details to change. trying to get gh-pages to
rebuild properly.
Merge pull request #18 from DavidGinzberg/gh-pages

Merging latest content with Master