docs: Clean up structure

Closes #117.
Rebase against master branch
Fixes incorrect reporting of missing semicolon

This fixes the incorrect reporting of missing semicolons when there is no whitespace between the end of a statement and the next token. The semicolon is already included in the tokens returned by `getTokens`, so grabbing one more character after would just grab a whitespace character. In this case because whitespace was not present it grabbed the closing curly, saw that it wasn't a semicolon and reported it as an error.

`setTimeout(function() {foo = "bar";});`

Fixes #121
Merge pull request #125 from iancmyers/fix-semi

Fixes incorrect reporting of missing semicolon
Merge pull request #117 from mathiasbynens/fix-docs

docs: Clean up structure
Rule: Variables should not be deleted
Rebasing on master
Removing merge originals
Merge pull request #114 from ilyavolodin/no-delete-var

Rule: Variables should not be deleted (fixes #112)