Initial commit flash lib + test. Datasheets.

Initial commit of Flash Library with tests.  Tests will exercise the
entire flash chip.  Tests were implemented and run on 1M chip.  Other
chips will be verified at a later time. Added datasheets for 1M, 2M, 4M,
8M, 16M, and 32M chips.
Merge pull request #30 from mikeneiderhauser/master

Initial commit flash lib + test. Datasheets.