Fix User Guide Search button issue

Signed-off-by: Hashem Qolami <hashem@qolami.com>
Update user_agents.php

Added Win 8.1 user agent to the array
Added post-increment for $count

It has been added the missing post-increment for variable $count.
Remove unneeded manual escaping of session data
Remove _serialize() and _unserialize() methods

Since removing the unneeded manual escaping code, there is no-longer any reason
to have the serialization functions abstracted. This also allows us to only
suppress errors when unserializing cookie data, and only trim when we are
unserializing database data (see commit 6b8312).
Merge pull request #2784 from captbaritone/bug/unneeded_session_code

Remove unneeded manual escaping of session data
Update Forum and Wiki links in Readme

Old links were 404ing
Merge pull request #2790 from captbaritone/patch-2

Update Forum and Wiki links in Readme
Merge pull request #2544 from HashemQolami/user-guide-patch

Fix User Guide CSS Issue
[ci skip] Add a missing semicolon in the docs css
[ci skip] Manually apply PR #2746 and remove other -moz-box-shadow and -webkit-box-shadow usage
A tiny improvement in ruri_string()
[ci skip] Remove a few spaces
Make CI_FTP::mkdir()'s first parameter mandatory (optional doesn't make sense)
FTP class improvements

 - Make changedir()'s first parameter mandatory (optional doesn't make sense)
 - Fix a few typos (langfile included)
Make CI_Lang::line()'s first parameter mandatory (optional doesn't make sense)
Merge pull request #2768 from porquero/patch-1

Added post-increment for $count
Merge pull request #2753 from SirDre/patch-1

Update user_agents.php
[ci skip] Some spaces & docblock fixes
Make CI_Unit_test::set_test_items()'s parameter mandatory (optional doesn't make sense)