Update README.md
Add UInt32Array
Merge branch 'feature/uint32-array' into develop
Release memory when Memory objects are collected by GC
Add comment
Merge branch 'feature/phantom-reference' into develop
Update README.md
Merge branch 'develop' of github.com:xerial/larray into develop
Add LArrayBuilder ofInt
Add LArrayBuilder.make
Fix loop index type
Add LArrayBuilder test and fix the timing of calling free
Update README.md
Merge branch 'feature/builder' into develop
Merge branch 'develop' of github.com:xerial/larray into develop
Remove an extra brace
Merge branch 'develop' of github.com:xerial/larray into develop

Add code to free memory with garbage collection.