Release v0.1.3

BugFix: flux can emit error correctly now.

Release v0.1.2

Upgrade ants to v2.

Release v0.1.1

[BUGFIX]: bugfix for SwitchIfEmpty.

v0.1.0

fix compatibility with ants.

v0.0.16

fix race test.

v0.0.15

update travis.

v0.0.13

add Take and ToChan for flux.

v0.0.4

update docs.

v0.0.3

shorten OnNext args and support mono.Processor.

v0.0.1

fix readme2