Point source to https://rubygems.org.
Updated for combustion 0.4.0
Merge pull request #4 from jcoyne/combustion_0.4.0

Updated for combustion 0.4.0
Merge pull request #3 from jcoyne/gemspec

Point source to https://rubygems.org.
Use the secure source (SSL) for rubygems
Merge pull request #5 from jcoyne/secure_rubygems

Use the secure source (SSL) for rubygems