miniasync version 0.2.0

• Version 0.2.0

This release:
- Adjust DML data mover to changes in
DSA standard to ensure data persistency.
- Adds flush operation to VDM and DML data mover.

Other changes and notable bug fixes:
- common: use correct atomics in ringbuf
- common: fix use-after-free in membuf in mt scenarios
- common: replace improper 'RPMA' in man pages with 'MINIASYNC'
- doc: add async property to documentation
- doc: update async property documentation
- doc: update code styling to properly appear in manpage
- masync: drop unused #ifdefs that block portability
- masync: add hashmap example
- masync: add flag indicating that future is async
- masync: add macro to check if chain entry was initialized