Revert "Update system/core/Log.php"

This reverts commit bbc6ab4736a896be83e3e3d5f8856374ffa2984c.
Revert "Update system/core/Common.php"

This reverts commit 8af05ac97513764cc539919e179794df87352c30.
Merge pull request #2243 from chrispassas/develop

Update system/core/Log.php
Merge pull request #2245 from maltzurra/patch-1

Fixed is_https() to avoid incorrect detection.
Fix some stuff from recent pull requests
Fix #2247
Add the Project Name to the Composer File.
Lowercase the project name as uppercase letters are not allowed.
Require at least PHP 5.1.6.
Update the required version of PHP to 5.2.4
Added keep-alive connection to SMTP. Fixed socket read/write timeouts. Added PHP useragent
Fixed form helper variable error

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Move mikey179/vfsStream to only be required on dev
Fix a JSON validation error
Merge pull request #2257 from appleboy/helper

Fixed form helper variable error
Fixed tab-indentation. Made appropriate entries in changelog
Clean up
Fixed curly braces. Removed redundant method set_useragent()
Styleguide fixes
removed PR from the bug list