This file is not in a class because it needs to be compatible with PHP 4.

Users can add a custom `bootstrap.php` file at the root of Piwik to customize constants. This file is included (if exists) in `index.php` and `piwik.php` but not in the console. This is now fixed.

See the user docs about this: http://piwik.org/docs/include-piwik-in-your-project/

- the error handler logs warnings and notices, and turns errors into exceptions (`ErrorException`)
- the exception handler catches all uncatched exceptions and display them to the user (HTML or CLI)
- the "screen" logging backend has been removed
- I've normalized exceptions/errors shown to the user in HTML (wether they are catched by the FrontController or not)

refs #5940 moved files into a subfolder framework, added autoloader to remove duplicated code to load autoload.php and to be able to register more autoloaders (eg for test files) on demand. This I got read of many includes that had to be updated all the time and that had to be updated all the time when moving iles

This could potentially cause some big problems.

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