Automatically build website.

Hopefully fixes #19

.Rbuildignore

@@ -1,3 +1,5 @@
+^docs$
+^_pkgdown\.yml$
 ^.*\.Rproj$
 ^\.Rproj\.user$
 ^\.travis\.yml$

.gitignore

@@ -1,3 +1,4 @@
 .Rproj.user
 .Rhistory
 .RData
+docs

.travis.yml

@@ -4,12 +4,28 @@ language: R
 sudo: false
 cache: packages
 
+matrix:
+  include:
+  - r: release
+    after_success:
+    - Rscript -e 'covr::codecov()'
+    before_deploy:
+    - R CMD INSTALL .
+    - Rscript -e 'pkgdown::build_site()'
+    deploy:
+      provider: pages
+      skip-cleanup: true
+      github-token: $GITHUB_TOKEN
+      local-dir: docs
+      fqdn: lobstr.r-lib.org
+      on:
+        branch: master
+
 r:
 - 3.1
 - 3.2
 - 3.3
 - oldrel
-- release
 - devel
 
 after_success:

DESCRIPTION

@@ -19,6 +19,7 @@ Imports:
 Suggests: 
     covr,
     pillar,
+    pkgdown,
     testthat
 LinkingTo: 
     Rcpp