Plugin API and new plugin for showing image number and total count.
Clear images using node deletion, to prevent removing other elements
inside viewer container.
Rename main.js to imageviewer.js.
Renamed main.js in Makefile
Add options for JSHint: maxlen=80 and globals=CustomEvent.
Fix warnings.
Move styles to separate file.
Style changes, positioning index element.
Switch to SASS.
Fix style for imageviewer and index.
Add build target for SASS.
Add title plugin.
Change dsiplay of title plugin.
Change background color of viewer in fullscreen to black.