fixed error in finding closing tag
Removed unnecessary parameter
Improved detecting whether the pointer is in a string or not
Remove Javascript inline comments + improved detecting whether the pointer is in a string or not
Fixed coding style
Add support for UPDATE ... RETURNING statements in PostgreSQL

An improved version of PR #2629.
Also removes REPLACE from the regular expression, as it is not supported by PostgreSQL.
Simulate a complete custom exception handler by redirecting uncaught events.
Really fix #2490, rel: #2629
Remove unnecessary chdir() in the shutdown handler.
Add changelog entry for #2633.
Fixed coding style
Merge pull request #2631 from mjnaderi/develop

Fixed errors in _minify_script_style
Make the changelog entry for #2633 more descriptive.
Merge pull request #2633 from kaiwangchen/simulate_complete_exception_handler

Simulate a complete custom exception handler by redirecting uncaught events
[ci skip] Simplify changelog message for PR #2633
Fixed issue #2638 which prevented loading models in sub-folders by passing an array.
Removed new line from the end of the file.
Drop the unused  parameter from log_message() / CI_Log::write_log()
Improvements to safe_mode detection (it doesn't exist in PHP 5.4)
Update MySQLi to use the PHP API for transactions, where possible