Add support for https behind a reverse proxy using X-Forwarded-Proto
Change True -> TRUE per codeigniter guidelines
Use codeigniter coding style
remove newline in system/core/Common.php
Added X-Forwarded-Proto support to changelog
remove newline at eof in syste/core/Common
Revert "remove newline at eof in syste/core/Common"

This reverts commit 7061bd014b6b7dbf89bf42e940aa134228f044ce.
fix indentation according to codeigniter codestyle system/core/Common
remove newline again in system/core/Common.php, silly editor keeps adding it
remove else clause in is_https function, just add return FALSE as fallback
some more readablility tweaks in system/core/Common
Merge pull request #2488 from Xeli/develop

Add support for https behind a reverse proxy using X-Forwarded-Proto