Adding integration test to test this code.

I also updated [ tracking api reference] to explain "cid" parameter.

cid — (requires token_auth to be set) defines the visitor ID for this request. You must set this value to exactly a 16 character hexadecimal string (containing only characters 01234567890abcdefABCDEF). When specified, the Visitor ID will be “enforced”. This means that if there is no recent visit with this visitor ID, a new one will be created. If a visit is found in the last 30 minutes with your specified Visitor Id, then the new action will be recorded to this existing visit.

This test failures, shows that the code was already covered, but we didn't notice that the code was broken: now it's working (limitBeforeGrouping set to 2)

fixing JS Asset manager not running (see below) by adding missing semicolon at the end of the minified files.

@gregor could you please update the library before minify to add this semicolon, so that next time you minify it just works.

Code used to test:
(function() {
    console.log('I worked!');
    alert('I worked!');
}());

No need for array_values

- Removal of unneeded CSS
- Type hinting for some methods
- Removal of commented var_dump's

Remove some whitespace

http://piwik.org/faq/how-to/#faq_111 - states that when record_statistics = 0 no connection to the DB is made, running scheduled tasks will connect to the db.

[ci skip]

Conflicts:
	plugins/CoreAdminHome/templates/jsTrackingGenerator.tpl