Merge pull request #58 from fundon/dev

Refactor minimap indicator, split updateScrollX and updateScrollY
Merge remote-tracking branch 'origin/dev'
Merge pull request #60 from fundon/dev

Fixed #59
Merge branch 'master' of github.com:fundon/atom-minimap
Forces the width of the minimap wrapper

It allow children of the wrapper to know the width of the display at
any time.
Changes the minimap char width scale

I was mislead by the lack of transform origin on the find-and-replace
and color-highlight layers.
Merge branch 'master' into dev