Report js filtering: filter NA salaries.

Add a checkbox in the salary filter form. When this checkbox is
unchecked, the job offers without a salary are hidden.
This parameter (the checkness of this new checkbox) is conserved
accros uses.
Report js filtering: fix issue #15 (salary comput).

Update the regexp reading the salary to be more resilient to strange
values (like "26400k€" instead of "26.4k€" or "26400€").
Does still not read salary not expressed in €/year or k€/year.
Report js filtering: form creation optimization.

Remove HTML "width" and "size" attributs from created <input type="text">
since those attributs seems to be bogus with jQuery. See jQuery bug #12429
<http://bugs.jquery.com/ticket/12429>.
Report js filtering: add cache to SalaryFilter.

Add a cache system (currently, a javascript array with string index,
which is in fact an hashmap) to the computation of the salary range of
an offer from its salary description.
Additionnally, update the table only when the salary handles are
released and not at every change. The salary filter feedback (reading
"De xk€ à yk€") is still updated at each change.
Additionnally, fix doc.
Report js filtering: optimize the filter apply.

Change the way the filters are applied. Now, changing a filter parameter
(e.g. Source from "Tout" to "APEC") only applies the javascript related
filter (e.g. SourceFilter.apply()).
The dynamic report gains in feedback, still work to do though.
Report js filtering: add pagination.

Add the js and css files simplePagination from
<http://flaviusmatis.github.com>.
Add a pagination system:
	* the filters only test the first n offers until the page is
		full;
	* when the user clicks on the "Next" button, the next offers
		are tested until the new page is full;
	* when the user changes the filter parameters, the system
		returns to page #1.
NB : the number of offers per page is currently given by
	MasterFilter.priv_rows_per_page
in file
	www/js/dynamic.js
Report js filtered: fix bug on NA checkbox.

Fix the way the "NA" checkbox was read so it now works.
Report js filtering: update report generation.
Merge branch 'report-js-filtering'.

Merge branch 'report-js-filtering' of github.com:yoannsculo/JobCatcher
into report-js-filtering.