restrict Rails 4 detect to be 4.0.x only
set config vars on first push again
Rails 4.1 support

* don't write `config/database.yml` in Rails 4.1, See https://github.com/rails/rails/pull/13463#issuecomment-31480799.
* setup env var SECRET_KEY_BASE for Rails 4.1's `config/secrets.yml`
Merge pull request #227 from heroku/rails41

Rails 4.1.0 Support
update changelog
bump to v103
rev hatchet version
Merge pull request #228 from heroku/schneems/rev-hatchet

rev hatchet version
Uses shellescape for serializing options for `env`

Prevents environment variables containing quotes from breaking
commandlines when shelling out.
test for #229 also protect weird values
Merge pull request #231 from heroku/merge-229

Merge shellescaping fixes.
update changelog
bump to v104
update changelog
Revert "Uses shellescape for serializing options for `env`"

This reverts commit 911642f7c25c229bec8ff7f44876abd26bbee8be.

Conflicts:
	lib/language_pack/shell_helpers.rb
remove merge conflict
refactor env escaping

add unit tests
don't escape twice
don't shellescape shell variables
fix quotes