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...
Correct a bad comment on thenBypassUnless (yet not documented) function
Merge pull request #583 from mickaelandrieu/master

Correct a bad comment on thenBypassUnless (yet not documented) function
fixed #582 - allow requiring node modules
closes #582 - ensure BC when specifying the extension
Update writing_modules documentation: CasperJS in now able to call/load nodejs modules

The same way phantomJS can.
Refactor to remove unnecessary entries in paths array
Merge pull request #588 from hexid/refactor-bc

Refactor to remove unnecessary entries in paths array
Add a better sample of nodejs modules integration https://github.com/n1k0/casperjs/pull/587
Update writing_modules.rst
Update writing_modules.rst