Slightly improved portability

v0.1.1

Improving portability and add missing externs.

First version with unity build

v0.1.0

Applying clang format throughout.

Feature-complete version

v0.0.3

Minor update to README following recent PR

complete research prototype

v0.0.2

Implementing "remove" as per https://github.com/RoaringBitmap/CRoarin…