Interface does not conflict with the keyword `int`.

When using the function snippet and declaring variables of type `int`,
the Interface snippet conflicts and interrupts the current snippet:

    func<tab>

    func foo(x int<tab>) type {
      // body
    }

Causes the interface snippet to kick in.
Add a `fmt.Println` snippet
Merge branch 'add_format_print_line'
Add a fmt.Printf snippet.
Merge branch 'printf_snippet'

Conflicts:
	info.plist
Merge pull request #2 from jish/master

add and improve snippets