Added small improvement to the _remove_evil_attributes function

Signed-off-by: brian978 <dbrian89@yahoo.com>
Merge remote-tracking branch 'upstream/develop' into dev/hex_xss
All the HEX code must be replaced or else some XSS attacks can be successful
All the HEX code must be replaced or else some XSS attacks can be successful
Merge remote-tracking branch 'upstream/develop' into develop
Fixed bug with regexp that matched tags
Merge branch 'dev/xss' into develop
Removed boundary from regexp
Modified regexp to match partial tags
Minify output in css and javascript code

Minify output in css and javascript code
Fix #2072
doc: xss_clean() method is in Security, not Input

The Input doc does talk about xss filtering, but they refer you to Security for details, which is where the function is actually defined.  It gives more detail about what the function is supposed to do, and avoids some irrelevance.

It's probably not a big deal; it just looks wrong.  It _might_ have been responsible for [confusion](http://stackoverflow.com/questions/13570522/this-input-xss-cleandata-giving-fatal-error-with-codeigniter) sometimes.
Fix function_usable()
Fix #2074
Fix 2073
Merge pull request #2069 from willmendesneto/develop

Minify output in css and javascript code
update for Issue #2064 (changed docblocks which return $this or only call a method that returns $this to @return CI_DB_class_name)
Merge pull request #2077 from AndrewPodner/develop

update for Issue #2064 - take 2
[ci skip] Fix some spaces
Issue #2078: refinement of the minify function for CSS and scripts.