referer

Returns the Server HTTP_REFERER variable. Useful for check the origin of
the user.

Conflicts:
	pi.surgeree.php
current_uri

Returns the entire uri for the current page, including the first /, to
match the behavior of the page_uri of exp:channel:entries.

Conflicts:
	pi.surgeree.php
redirect

Better than the default redirect variable of EEMCS. Allows to set the
response code. Using url helper of Code Igniter, since EE->redirect
doesn't allow to set the response code.
Parameters: "response_code" and "location".

Conflicts:
	pi.surgeree.php
entry_id_2_url_title

Some addons accepts URL_TITLE as parametes. Odd, I know!

Conflicts:
	pi.surgeree.php
split_string

Specially useful to grab data from url_segments. Split string by a
delimiter and returns a loop.
Parameters: "delimiter" and "string". Variable:
"surg:split_string:item". I'm prefixing variables to avoid conflicts to
other addons. Sometimes the names of the variables can be too common,
but is up to you decide! I can update my job!

Conflicts:
	pi.surgeree.php
support for arrays on function post

Parameters added:
sanitize: "filename", "search", "html" or "sql". All options are, in one
or other time, filtered by XSS_filter.
check_XID: "no" as default. In case of "yes", check for the post of a
valid XID and returns empty em case of false.
$glue: implode the array using this parameter as glue. For traditional
use as single variable.
split_by: in case of using as variable pair and post of string, explodes
the variable.

Variable: surg:post:value, in case of using as variable pair.

Conflicts:
	pi.surgeree.php
XSS filtering on get function by default

Conflicts:
	pi.surgeree.php
Add a gitignore file for backup files from merge conflicts.