Changes: summarize changes since v0.1.0 release
INSTALL: remove dependencies

Too hard to maintain. One should look directly at the _oasis file.
INSTALL: improve instructions and emphasize "from source"

Given instructions are only when compiling from source, so that is
clarified.
release version 0.2.0
_oasis: mark as working on version 0.3
Merge branch 'v0.2' into v0.3-dev