A Scala implementation of the geohashing algorithm as described at http://en.wikipedia.org/wiki/Geohash and originally made available at http://geohash.org/
This implementation is an exercise in writing idiomatic Scala and using the Scala toolset (SBT, ScalaCheck and ScalaStyle).
##Usage:
import com.github.davidallsopp.geohash.GeoHash._
encode(12.345, 123.456) // latitude, longitude
// res0: String = wdpy1r3fv6c9 // using default precision of 12 chars
encode(lat=12.345, lon=123.456) // named arguments to avoid mixing up latitude and longitude
// res1: String = wdpy1r3fv6c9 // using default precision of 12 chars
encode(12.345, 123.456, 6) // specify precision of 6 chars
// res2: String = wdpy1r
decode("wdpy1r3fv6c9")
// res2: (Double, Double) = (12.345000011846423,123.45599988475442)
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