file installer support #121
add erubis as a requirement (for rendering templates)
officially depreciate transfer :render
clarify that templates can access package methods
make sure md5 is availble inside the verify block
version and description should be accessible inside the verify block
remove instructions for templates with transfer
allow templates with absolute path
file installer tests
render tests
add tests
Merge branch 'file_installer'
* Fix issues with rails examples
* Fix issues with normalize not handing back a true list of unique packages
* Fix issue with `version` not being accessible in the installer scope
* Fix issue with recommends not working with the new package repository
0.7.1.1