Config environment variables directly in .bashrc (linux) and .launchctl.config (osx) config files

```
This is a way which I found to config variables permanently in some
OSs.

In the current methods, the environment variables are lost after reboot
in OSs like OSX and Ubuntu.

To test if this PR, I recommend renaming .bashrc or .launchctl.config to
something like $ENV{HOME}/test.txt
```

Update:

Please discard the changes proposed by this PR. @utensil brough a suggestion (https://github.com/numenta/nupic/pull/801#issuecomment-40172540) that I think will work..

Read this: 
https://github.com/numenta/nupic/pull/801#issuecomment-40196883