switch Documenter deployment to linux; osx not working on Travis at the moment

Author: Hua-Zhou

docs/make.jl

@@ -6,5 +6,5 @@ deploydocs(
   deps   = Deps.pip("pygments", "mkdocs", "mkdocs-material", "python-markdown-math"),
   repo   = "github.com:OpenMendel/VarianceComponentModels.jl.git",
   julia  = "0.6",
-  osname = "osx"
+  osname = "linux"
   )

docs/mkdocs.yml

@@ -14,7 +14,7 @@ extra_css:
   - assets/Documenter.css
 
 extra_javascript:
-  - https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML
+  - https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML
   - assets/mathjaxhelper.js
 
 markdown_extensions:
@@ -26,7 +26,7 @@ markdown_extensions:
   - admonition
 
 extra_javascript:
-  - https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML
+  - https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML
   - assets/mathjaxhelper.js
 
 docs_dir: 'build'

docs/src/index.md

@@ -32,7 +32,7 @@ Use the Julia package manager to install VarianceComponentModels.jl.
 ```julia
 Pkg.clone("https://github.com/OpenMendel/VarianceComponentModels.jl.git")
 ```
-This package supports Julia `0.4` and `0.5`.
+This package supports Julia `0.6`.
 
 ## Manual Outline