src/url.php: Change comment format for 'readQueryFromURI' to make it more standardized.
src/url.php: Add function 'queryToArray' and have 'readQueryFromURI' leverage this new function instead of duplicating work/code; add more test-cases over 'readQueryFromURI', to assert both methods are functioning well.
src/test/webapp.php: Add mechanism for retrieving the "query" (URL query string) for the current page.
src/web-client/html-form.php: Add static method 'fromString', which is simply a wrapper for the class's constructor, but makes the initialization more explicit with regard to the source of the HTML.
src/webapp/filters/csrf-guard.php: Add mechanism by which forms can be explicitly included/excluded in/from the CSRF protection, via method 'shouldGuardForm', with the default implementation including all forms except those that use method 'get'.