xhprof removed their composer.json file, adding it to our composer.json file so we can still use composer to manage xhprof. Added an extra script to make sure the update is clean for git users.

fixed composer.json to download the same set of vendors as with use of composer.lock. that way Piwik can be also installed with Composer as dependency along with its dependencies

set device detector version to 1.0, as next release of device detector will break with piwik until some adjustments are made

Refs #5031 Now getting PHPUnit from composer/packagist. This will make like better for core team devs
Updating readme with instructions.
I also hope this will solve the Autoloader issue on the UI build: https://travis-ci.org/piwik/piwik-ui-tests

UserAgentParserEnhanced is now required and used from it's own composer package (piwik/device-detector); additionally Spyc library is required as composer package and removed from piwik source

refs #4121 added simple command line tool including a not yet working tests and generatePlugin command

Since Piwik does NOT follow PSR-0, composer makes unnecessary file system calls for every single class. Piwik's own autoloader knows how to load Piwik's classes.

Piwik\Core
Piwik\Plugin

git-svn-id: http://dev.piwik.org/svn/trunk@6722 59fd770c-687e-43c8-a1e3-f5a4ff64c105