basic bigtop support
bigtop developer mode
update readme
removing problematic minitest-handler for now
add bigtop kitchen tests minus debian
exclude ubuntu14 for bigtop
simplify apt logic, always set trusted to something
default to centos 6 for amazon linux
add note about not validating codename for bigtop
better amazon detection behavior
revert back to original suggestion
Merge pull request #105 from caskdata/feature/bigtop-support

Feature/bigtop support