[package] dpkg control fields are case-insensitive.

From: Dustin L. Howett <dustin@howett.net>

git-svn-id: http://svn.howett.net/svn/theos/trunk@610 4410221e-0ddf-4ce3-99c0-2db6c0dbc727
[bootstrap] Explicitly state the bootstrap command, because it was tripping people up. Closes pull request #66.

From: Dustin L. Howett <dustin@howett.net>

git-svn-id: http://svn.howett.net/svn/theos/trunk@611 4410221e-0ddf-4ce3-99c0-2db6c0dbc727