Added meteor-prerelease tag to ingore prerelease err
Fixed var names and boolean checks
Changed the meteor options to be flags.

Both --meteor-debug and --meteor-prerelease default to false and no longer
require that you pass a value. The option for prerelease has also been updated
to `-e` since `-P` didn't seem to work for some unknown reason.
Fixed a typo.
1.0.3
Merged in hotfix/meteor-prerelease (pull request #19)

Added meteor-prerelease tag to ingore prerelease err