Fix deprecation warnings on julia v0.6 (#15)
* update array constructor syntax
to remove deprecation warning on julia v0.6
* Travis test on v0.6
Use default Travis testing script.
REQUIRE GeoInterface 0.2
* don't extend `./` from Base
This method does not fit the meaning of `./` in Base,
and causes a deprecation warning on julia v0.6.
* Require GeoInterface 0.2.1
That version has no deprecation warnings on julia v0.6
* remove + and / for Point
(Yeesian's words, I agree)
- it's unhelpful to think of e.g. lat/lon being in some vector space
- if we want to implement them, it should be at the GeoInterface level, rather than in this package
* remove exports
all RGBGradients did not exist in this package
Handle does, but unclear why (only) this needs to be exported,
name is quite generic.
* use Base.Test instead of FactCheck
* add note on compose.jl inclusion
