Add zipConst to HList
Add zipConst to tuples
Merge pull request #40 from ceedubs/wip/zipConst

Add zipConst to HLists and tuples
Use SBT 0.13.0-RC3; updated plugin versions and added sbt-release, sbt-buildinfo and sbt-git.
Add and use encrypted Sonatype credentials on Travis CI.
Added BuildInfo.
Build.data is deprecated, use Attributed.data instead.
Added release plugin.
Only publish snapshots for master and scala-2.11.x branches.
Only publish Oracle JDK 7 artefacts.
Fn(Un)HLister/(un)hlisted => Fn[To|From]Product/[to|from]Product; Aux
traits replaced with type aliases.