add alreadyInitialized option which skips piwik initialization

[swergas]

Naive fix for #41

[coveralls]

Coverage remained the same at 100.0% when pulling 55a93a2 on assembl:skip_piwik_initialization into 999fe4b on joernroeder:master.

[sapegin]

@swergas @joernroeder How can I help to get this merged? Have a similar issue.

[joernroeder]

@swergas @sapegin

i've looked at this today and propose another pull request which introduces a dynamic "already initialized" check #46 .
would you mind to pull down the feature branch and give it a try?

[joernroeder]

@swergas thanks for contributing! I'm going to close this request for now as #46 builds on top of it.
feel free to reopen this thread :)