Tag Stan.jl v3.0.0

[attobot]

Repository: goedman/Stan.jl
Release: v3.0.0
Diff: vs v2.0.1
requires vs v2.0.1:

--- 2.0.1/requires
+++ 3.0.0/requires
@@ -1,4 +1,4 @@
-julia 0.5.0
+julia 0.7-
 Documenter 0.10.0
 #Mamba 0.10
 #Gadfly 0.5.2

cc: @goedman

Please make sure that:

• CI passes for supported Julia versions (if applicable).
• Version bounds reflect minimum requirements.

[goedman]

Thanks @aviks! I know I will have to make several further updates when Julia 0.7 is released (like changing nightly into 0.7 in .travis.yml), but I decided to do that in the 3.0.1 release. Thanks again for your help!