fix bug in callback functions to ensure presence of env variable
added function for swapping RVM gemsets
bump version
Change delimeter in sed in script/bootstrap

When aws_secret_access_keys contains a '/' character, it will fail, so
change the delimeter to a '#', which doesn't occur in the string
bump version after merged pull request
Merge branch 'master' of https://github.com/edjames/mac-dots