Sort works
Nested loop works in sorting, support small N
Revert "Nested loop works in sorting, support small N"

This reverts commit 9dcd219bd13a10ba101c5af278308b539bd5070f.
Avoid redundant call to getElements function
Add key for JNI result
Add working sort test
Add clean.sh to class-to-jni
Compile java to class in class-to-jni
32bit issue: cannot recognize array len
Adding better debug log and fixed array ref error in 32bit
Add sort time in HelloWorld.java
Allow functions without 'return' block
Add -O3 to generate vector code