added MYSQL_LICENSE to DatabaseLicenseModel
Merge branch 'develop' of git@github.com:greese/dasein-cloud-core.git into develop-PRE-RELEASE
MachineImage now contains minimum required disk size. defaults to 10gb
if not specified.
Revert "added MYSQL_LICENSE to DatabaseLicenseModel"

This reverts commit 01feb4f7bbf119ba6a072f9d66ecec569a5bb551.
Merge pull request #315 from unwin/develop-PRE-RELEASE

Develop pre release