First make sure you understand binstubs.
Follow this excellent tutorial on rubies and bundles.
For reasons explained there, you could:
bundle install --binstubs=.bundle/bin
and edit your path:
echo "PATH=.bundle/bin:$PATH" >> ~/.bashrc
but then you still have to remember to run bundle install with that stuff on the end so do this:
$ cat ~/.bundle/config
---
BUNDLE_PATH: .bundle
BUNDLE_BIN: .bundle/bin
Then you can just bundle install and it works.
And if you wanna update Sublime Text:
{
"folders":
[
{
"folder_exclude_patterns": [".bundle/bin"]
}
]
}