Fix line number on new line

Split from https://github.com/limetext/lime/pull/439
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Merge pull request #441 from mmstick/patch-3

Fix line number on new line
Fix TestLoadKeyBinding test

testdata/Default.sublime-keymap has 3 "i" key bindings, not 69.
Merge pull request #443 from alexandershov/master

Fix TestLoadKeyBinding test
backend/log: Properly expand var-args + test
backend/watch: Move over to gopkg.in/fsnotify.v1
backend/watch: ioutil.WriteFile -> os.Create, equal -> reflect.DeepEqual, deferred cleanup
backend/watch: Mutex lock dummy functions to avoid race issues