ASGARD-1108 Add cr1.8xlarge instance type
Allow instance types with no hardware/pricing metadata
Deprecate unsafe method for future clean up
ASGARD-1047	Instance type prices with 2 decimal places
Tighten instance type storage column width
Merge pull request #271 from joesondow/ASGARD-1108-cr1.8xlarge

@claymccoy this is needed immediately, so I'm merging before the code review.