Merge pull request #14 from kageurufu/master

Add browser retrying on exception
Make persona vars avaiable to more steps
Merge pull request #16 from rosselliott/more-use-of-personas

Make persona vars avaiable to more steps
Don't create multiple browser sessions per scenario
Don't create multiple browser sessions per scenario
Updated readme
Fixed typos
Execute js
Evaluate js
Update url.py

Added @persona_vars decorator to 'I visit URL/I go to URL" step so I can use variables in the URL.
Merge pull request #18 from julianpistorius/patch-1

Update url.py
Merge branch 'pr/17'

Conflicts:
	CHANGES.txt
fix style from pr/17
Cookie handling
fix no cookie test
Prepare behaving 0.8.
vb
Dependencies
Skeleton for mobile apps
Environment for mobile