Add Database.InfluxDB.TH
Use deriveFromSeriesData to generate FromSeriesData instance for Point
Add ConstraintKinds for GHC 7.4

I don't quite understand why this is needed. This is a workaround for
https://travis-ci.org/maoe/influxdb-haskell/jobs/22959983.
Add support for KindedTV
Add driveToSeriesData and deriveSeriesData
Use deriveSeriesData instead of manual instance declarations
travis: Add ghc-7.8.2
travis: Use --cabal-name instead of symlink
Merge branch 'feature/th' into develop
Merge branch 'feature/ghc-7.8.2' into develop