Vectorization depwarns accidentally export functions

[carlobaldassi]

Despite the check of the julia version on the export statement in SpecialFunctions.jl, the vectorization deprecation warnings still export some functions.

Example: on julia 0.5:

julia-0.5> using SpecialFunctions

julia-0.5> erf
WARNING: both SpecialFunctions and Base export "erf"; uses of it in module Main must be qualified
ERROR: UndefVarError: erf not defined

Of course, this breaks compatibility in code that is supposed to work on julia 0.5 and later.

[carlobaldassi]

Just for completeness, a solution for now is a very ugly conditional import:

VERSION >= v"0.6.0-dev.2767" && using SpecialFunctions

[ararslan]

Can we just delete the deprecations at this point and assume that people will use dot-broadcast for vectorization? I'd be willing to bet that people are already familiar with doing that anyway.

[devmotion]

The deprecations were removed in #39.