Allow qrcs to be added to avogadro plugins.

Change-Id: I9404e98dc1e6602c4c52075a942dde7c637bde45
Add icons to existing tools.

Change-Id: Ia1d0152ea4ca02890a903859536bd884158cc0e8
Take care of initializing the resources in static plugins

Necessary when we build plugins statically.

Change-Id: If0815299276feb6b72025b75c294048a6ea15e11
Merge topic 'icons' into master

c571aa35 Take care of initializing the resources in static plugins
2d9480ae Add icons to existing tools.
b2d182e7 Allow qrcs to be added to avogadro plugins.