explicitly specify user agent when querying user name and ref for pull request in install_github
add NEWS
Merge pull request #423 from krlmlr/405-github-pull-forbidden

Explicitly specify user agent when querying user name and ref for pull request in install_github
Don't ignore RStudio project file.
Also update to use devtools
Add add_build_ignore
Implement add_travis()
Implement add_rstudio_project()
Add rstudio argument to create().
Make functions more chatty
More advice in add_travis()
Don't save/load workspace for packages
Add full stop to default package doc
Automatically create testing skeleton when needed
Better name: add_test_infrastructure
Export add_test_infrastructure
Rename travis template to avoid check warning
Don't reuse existing name
Upgrade to roxygen2 4.0.0
Remove old @S3method
Export add_travis