JSONObject --> LinkedHashMap 으로 변경
Change event name
time -> timeStamp
Merge branch 'feature/timeStamp' into develop

Conflicts:
	src/com/mixpanel/android/mpmetrics/MixpanelAPI.java
merge LinkedHashMap
Data Compression prototype
Snappy works : server-client tested
add JSnappy Library + Code cleanup
Code cleanup

 * postData : compress(압축 종류)를 변수로 뺌
Merge branch 'develop'