Before, the search was a single value.
Now it is splited in chuncks when separated by spaces.
Except if they are enclosed by single quotes or double quotes.
For some reasons, the unit tests are working for both single and double quotes but the
search box isn't. It is working only with single quotes.
We need to investigate the reason of this behavior.
See #823
There is now an object to manipulate user queries. It allows to move logic to handle those from the view and the controller in the model.
Thus making the view and the controller easier to read.
I introduced a new interface to start using dependency injection. There is still some rough edges but we are moving in the right direction.
The new object is fully tested but it still need some improvements, for instance, it is still tied to the search object.
There might be a better way to do that.
I figured that the code for the search could be extracted from the context to have separation of concern.
It supports multiple keywords. It suports also multiple tag keywords.
This feature is not in use at the moment, but it will be handy to reorganize the query building process. It allows to have more than one keyword in the search box.
Full tests are available as well.
It probably needs a refactoring later, but I think this is the first step to make the application full object oriented and testable.
