Extended password validation based on hooks and PasswordValidator interface.
Password validation logic removed from UsersManager plugin file and implement in hook result. (in separate plugins)
Added events documentation.
Fix parameter type.
Added hooks to init session process.
Revert comment from file header.
fix ui build
Merge branch 'master' of github.com:piwik/piwik
Merge pull request #310 from czolnowski/login-flow

New hooks fixes #5331
Merge pull request #298 from czolnowski/password-validator

Password validation extension
Add small base test case class for testing console commands.
fix ui build
refs #5326 does widget definitions were duplicated I think
Make sure screenshot tests do not fail mysteriously if the REQUEST_URI doesn't end w/ a /. (Piwik will assume such a URI points to a file and not a folder, and cut it out when determining the root Piwik URL.)
put most useful settings first
Merge remote-tracking branch 'origin/master'
Show example of config.js for screenshot test config
Fix typo from previous commit
Merge branch 'master' into DeviceDetector2