Piwik is a free/libre analytics platform. Refs #4455 GNU Package requirement to use free/libre instead of open source

using phpstorm optimize imports feature

using phpstorm optimize imports feature

fixes #4609

(some tests failing)

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

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.

Converting Piwik core source files, PHP, JS, TPL, CSS

More info: http://piwik.org/participate/coding-standards/

 * Adding one sentence to one paragraph description of each API (feedback on the actual test is most welcome!)
 * This will be displayed on the API Reference page: http://piwik.org/docs/analytics-api/reference/ 
that's why it's pretty important :)
 * Adding table of contents in the API Page

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Added support for JSON/Serialized PHP export of Multi dimensional arrays in API responses, used by Alert plugin in the UI (json)

git-svn-id: http://dev.piwik.org/svn/trunk@2514 59fd770c-687e-43c8-a1e3-f5a4ff64c105

Now testing various API exports for ExampleAPI plugins, for all API formats: xml, csv, tsv, json, etc.
Any breaking or modifying change in the renderer or data conversion should trigger a test fail.

Improved parameters in ExampleAPI API.php 
Refs #1446

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 * add @category (Piwik => 'core', Piwik_Plugins => 'plugins')
 * in core, use @package and @subpackage more consistently to group files/classes; exception is DataFiles/*, PluginsFunctions/*, and SmartyPlugins/*
 * in plugins, @package is the plugin name
 * removed '@param none' -- not a phpdoc convention
 * '@throws' and '@return void' are also not phpdoc conventions, but are widely used elsewhere, e.g., Smarty & Zend


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libs.  (I didn't touch: open-flash-chart, Zend Framework, and PEAR HTML.)


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- fixing recently introduced sorting issue, refactoring, cleaning up the generic filters concept by removing the automatic sorting of data
- fixing issue when executing unit tests would invalidate tmp/cache/tracker files
- fixed edge case issue when calling several apis from one http request, and requesting recursive output, it was failing in some random cases
- adding a unit test that calls all callable api methods and check for non empty output
- 

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- goal table icon below datatable that have goal segmentation
- rss export icon below datatable
- cleaning code, refactoring, renaming goodness
- adding switch enable_detect_unique_visitor_using_settings that enables/disable heuristic based on config hash
- refactoring how plugins handle archiving for more clarity 

git-svn-id: http://dev.piwik.org/svn/trunk@838 59fd770c-687e-43c8-a1e3-f5a4ff64c105

- deleting class Api_Apiable concept not used anymore


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- cleaning plugins listing, splitting ExamplePlugin in multiple small plugins, renamed Home -> CoreHome PluginsAdmin -> CorePluginsAdmin AdminHome -> CoreAdminHome
- simplified authentication classes (not using Zend_Auth_Db anymore)
- adding a new widget listing the last posts on Piwik.org/blog

git-svn-id: http://dev.piwik.org/svn/trunk@581 59fd770c-687e-43c8-a1e3-f5a4ff64c105

- renamed empty filter to Null filter
- columns are now renamed recursively, fixing bug in not valid XML code when the columns still had a numeric name
- added a new parameter in API for Referers module: expanded. If set to true, it will load the data recursively (eg. all keywords + the search engines for each keyword).

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- adding documentation on http://dev.piwik.org/trac/wiki/Plugins/GlobalFunctions about plugins development

git-svn-id: http://dev.piwik.org/svn/trunk@376 59fd770c-687e-43c8-a1e3-f5a4ff64c105

- fix redirect bug in download/outlink tracking refs #40

git-svn-id: http://dev.piwik.org/svn/trunk@361 59fd770c-687e-43c8-a1e3-f5a4ff64c105