JNI FindClass result caching and AttachCurrentThread if it was detached.
Small compilation fix for haxe 3
Removed unnecessary LOGV and LOGE declarations from AndroidFrame.cpp
Merge pull request #67 from DanielUranga/master

JNI FindClass result caching and AttachCurrentThread if it was detached.
It is a "best practice" as explained here: http://www.ibm.com/developerworks/library/j-jni/#notc