* temporarily disable [] tests
* getAbsoluteUrl uses & and not & by default
* __toString uses & and does not match getAbsoluteUrl by default
* addParams MUST hide existing ones, getValues still ships them
fixes#6604
Different changes have been applied:
* Allow integer unix timestamps as parameters for timestamp columns
* Remove alias-rewriting from Url class
* Remove all traces of raw_timestamp
* Use new filters
The constructor of the class is now private, instantiation happens
with Url::fromRequest and Url::fromPath. Also updated all occurences
of Url and fixed the Qlink helper to not overwrite the baseUrl with null
values
refs #4381