Merge pull request #30 from Prismatic/v0.3.0

Add ClojureScript support via cljx
More useful and idiomatic conditional operations
Update changelog for breaking changes in ?> and ?>>
Merge pull request #31 from Prismatic/nicer-conditional-arrows

More useful and idiomatic conditional operations
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Merge branch 'master' into v0.3.0

Conflicts:
	README.md