updating assert init file for Assert 2.1.0

* see: https://github.com/redding/assert/commit/39650b82a4e7f46e009c3aacb7345e23358c8efb
some updates bash aliases

Tweak to how pry is launched.  Added some auto bundle exec to a few
new cmds I'm using now.
updating my git `aa` alias for the latest syntax for adding all
fast forward only on git pulls

/ht @jbgo: jbgo/dotfiles@36417711a1f1520bf7e196be2ba055b315f2b6b9
global git ignore for .powrc files

Adding these files to my apps not that I'm using rb:
https://github.com/redding/rb

```
source `which rb` && rb @
```