Fix compiler warning
Setting version to 1.5.0
Setting version to 1.5.1-SNAPSHOT
Merge branch 'master' into series/1.5.x

Conflicts:
	version.sbt
Update mima exclusions
Fix bound on int codec test
Refactor CoproductCodecBuilder.as
Change version and build as result of merge from series/1.5.x
fix README
Merge pull request #37 from pocketberserker/fix-README

fix README
Extract typeclass that supports exmap, xmap, narrow, widen, pxmap, and as
Merge branch 'master' into topic/shapeless-2.1