Added namespaces to functions.php files in the five plugins that had one
Work in progress

renaming Unzip to Uncompress,
Renaming Tracker/Referer to Tracker/Referrer,
and few more

Removed many Piwik_ functions, in Piwik 2 it is best practise to use the methods calls instead

Todo: finish converting core/ classes + convert plugins/ classes to use \Piwik\Plugin namespace + fix build + Merge master

Refs #4059 Work in progress: Conversion to use Namespaces: Period*, Metrics, Segment, SegmentExpression, PluginsManager.
Removed some deprecated code.

Notice that auto refactoring has created a nested namespace. Not sure this is what we want - so we might have to edit those nested namespaces afterwards (I think they don't look so good)

Notice that auto refactoring has created a nested namespace. Not sure this is what we want - so we might have to edit those nested namespaces afterwards (I think they don't look so good)

2 steps required:

1. Refactor > Move > \Piwik\Core\Config (uncheck "Create new File")
2. Refactor > Rename > Piwik_Config to Config

Also moved some other const to Piwik class.

such as removing duplicate code and a lot of refactoring, the code is now much more readable!

Removing what seems to be unused code? @sgiehl you added it but I cant find any code calling generateDatatable.

Introducing new PluginsArchiver class. Plugins can create an Archiver inheriting this abstract class.

Adding setting for limiting Custom Variables report in the config file, separate from the referrer config.
This is especially useful to fix an ecommerce bug where "Visits" don't display properly for all products, since we used to truncate after 50 rows.
Also sets by default to 1000 to ensure ecommerce tracking mostly work.
Refs #3569

Factoring out archiving Custom variables + cleaning it up (breaking down huge archiveDay function into several methods)

Renaming some core code to make sense (sumMetrics and makeEmptyRow instead of ugly names)

TODO: continue with other plugins