Toggling LED on MinnowBoard.txt: Scott's edits

Editorial revisions to the LED togging guide. Side notes to Jayneil
are prefixed with NOTE TO JAYNEIL:

Signed-off-by: Scott Garman <sgarman@zenlinux.com>
Getting Started with the MinnowBoard.txt: Scott's edits

Editorial revisions based on the LED toggling guide. Side notes to
Jayneil are prefixed with NOTE TO JAYNEIL:

Signed-off-by: Scott Garman <sgarman@zenlinux.com>
GPIO Programming on the MinnowBoard.txt: Scott's edits

Editorial revisions based on the LED toggling guide. Side notes to
Jayneil are prefixed with NOTE TO JAYNEIL:

Signed-off-by: Scott Garman <sgarman@zenlinux.com>
Physical Computing on the MinnowBoard.txt: Scott's edits

Editorial revisions based on the LED toggling guide. Side notes to
Jayneil are prefixed with NOTE TO JAYNEIL:

Signed-off-by: Scott Garman <sgarman@zenlinux.com>
Merge pull request #1 from ScottGarman/master

Scott's first set of changes