Update python test script to work with python3
added more illustrative example for Casper#eachThen
Merge pull request #568 from hexid/python3-tests

Update python test script to work with python3
fixes #544 - treat any input tag type as valid when filling forms
refs #569 - strengthened popup tests
Update casper.rst

Trying to fix the example code for changing the user-agent. 
Current example doesn't work.
Fixed wrong comment

Fixes a wrong comment in an example
Merge pull request #573 from infinit89/patch-1

Fixed wrong comment
Merge pull request #572 from shekyan/patch-1

Update casper.rst
For clarity
Add new information about Mac OS X installation (brew update/ugrade/install)
#574 : improve macOSX documentation

I know speak english
Update last zip/tarball for last stable release
Update tester.rst (very minor fix)
Merge pull request #577 from mickaelandrieu/master

Update tester.rst (very minor fix)
Update quickstart.rst (very minor update)
Merge pull request #578 from mickaelandrieu/master

Update quickstart.rst (very minor update)
Add to tester api documentation the options "--no-colors" and "--concise"

As well introduced here : https://github.com/n1k0/casperjs/blob/master/tests/run.js
Update testing.rst
Merge pull request #579 from mickaelandrieu/master

Add to tester api documentation the options "--no-colors" and "--concise...