fixed for Xcode 6 running on iOS7 simulator in OS X Yosemite
refactored for performance

the next and release methods are computed once at class initialization
time
using more elaborate preprocessing to account for Mac SDKs
Merge pull request #365 from CalQL8ed-K-OS/issue/347-Crash_on_iOS_7_in_DDASLLogCapture

DDASLLogCapture fixed for Xcode 6 running on iOS7 simulator in OS X Yosemite