Merge pull request #1763 from pickupman/bugfix-form_validation-is_unique

Fix #1741 is_unique duplicated in documentation for Form_validation
Merge pull request #1764 from WDC/patch-2

Whitespace Removal in config/constants.php
Added Calendar library unit test
Merge branch 'develop' of github.com:EllisLab/CodeIgniter into codeigniter/develop
Fixed issues #1756 and #1711

Signed-off-by: dchill42 <dchill42@gmail.com>
That doesn't go there. Put cache fix around correct query.

Signed-off-by: dchill42 <dchill42@gmail.com>
Add documation to user guide for Migrations class
More complicated but faster method

Also added a comment to explain the reason for such a complicated method
Merge pull request #1750 from vlakoff/develop

Simplification in Text Helper's character_limiter()
Merge pull request #1771 from pickupman/user_guide-migrations

Add documation to user guide for Migrations class
Merge pull request #1770 from dchill42/session

Session Fixes for #1711 and #1756
Cleanup and optimize new Session classes
Misc. style changes
Database display error supporting "Loader.php" and "MY_Loader.php"
Check for "Loader" in $call['class'] instead of $call['file']
Merge pull request #1760 from vlakoff/develop-2

Better old captcha image test
Merge pull request #1776 from eweap/db-display-error

Database display error supporting "Loader.php" and "MY_Loader.php"
Merge pull request #1720 from appleboy/doc

fix issue #1719 and update ip address length on captcha helper
Removed the &nbsp; from the default config variables in the pagination class. Fixes #187 and #208

Signed-off-by: Alex Bilbie <alex@alexbilbie.com>
Better server test in redirect() of URL helper

"Location" header bugs are specific to IIS; previous test was matching
all HTTP servers under Windows.

This test isn't perfect yet ($_SERVER['SERVER_SOFTWARE'], which
corresponds to the "Server" header of HTTP response, might be missing),
but there is no perfect test.

"Refresh" method makes the window blank for quite a noticeable time,
so let's not affect other servers because of IIS.