Fixed crash when stringWithDetectedCharset in MCData returns NULL for Japanese text encoding.
Merge branch 'fix-for-jap-encoding-crash' into mc-master
case insensitive header lookup
Fixed intersction methods
Merge pull request #738 from CleanShavenApps/mc-master

Potential fix for crashes caused by NULL value returned when parsing text with japanese encoding
Updated to libetpan 8f5362931453920803a270c6d35ab82f69a02525
Fixed #755: fixed build on xcode6 with iOS8 SDK