Add syntactic example
More specific name for lintr.gif
Add lintr screenshot
Actually add the files
Add files to Rbuildignore
Handle parsing errors
Tweaks to get parse errors working well
Fix absolute paths linter
Properly handle escaped characters
Add rmd linter for paths
Lint testing framework and tests

tests:

- absolute paths
- assignment
- single quotes
Add travis
Tweak README
Fix testing check
Remove styleR tests
Add tab linter
Rename rmd linter
Add default linters
Rename no tab linter
Add links to DESCRIPTION