Feature/better defaults

Better defaults for the new core;
* 100, 500, 1000 pagination options. Nobody wants to only see 25 of anything.
* Adds default colors
* Adds plase and milestone types
* Adds colors to types
* Makes timelines a default module
* Improves error verbosity of load_default_data rake task

Only merge after https://github.com/opf/openproject/pull/281