Bump version -> 0.6.1 (#525)

include fairadapt.R (#520)

* also include docs, examples, tests in source dist

add docs requirements

Signed-off-by: Samuel Hoffman <hoffman.sc@gmail.com>

version bump -> 0.4.0

version bump -> 0.3.0 (#176)

fallback to http instead of ftp (#166)

version bump -> v0.2.3

Version bump -> 0.2.2 (#107)

Version bump -> 0.2.1 (#96)

Change numpy requirement to >=1.16

version bump 0.1.1 -> 0.2.0

also added some more badges to the README