Basic class to replace filter_input functionality #257
Introduce xt_filter_var, switch instances of filter_var to it
Remove couple of not-needed filter_var instances
Differentiate between validation/sanitization filters
Add arguments to both functions to eliminate confusion
Add default value for `super` variable
Caught a filter_var trying to escape his destiny
Change class/functions prefix from xt_ to wp_stream_
Merge branch 'develop' into issue-257

Conflicts:
	includes/log.php
Code formatting
Merge pull request #264 from x-team/issue-257

257: Basic class to replace filter_input functionality