added nvm unload method to remove nvm from shell
Added test for nvm unload
Updating CONTRIBUTING guidelines

Fixes #425
Filter out of `nvm ls` things that start with a dot. Fixes #421, closes #422.
export NVM_DIR before sourcing nvm.sh
Merge pull request #376 from koenpunt/nvm-unload

Feature: nvm unload
Adding a trailing newline
Merge pull request #428 from koenpunt/export-nvm-dir-in-profile

export NVM_DIR in profile before sourcing nvm.sh
Fix copy-packages
Geekjuice version