if compact, expand node on hover

this will expand compact nodes to their full view on mouse over
prevent monitors from unselecting themselves
monitors: scale y-axis for positive activation
autoscale y-axis also for negative activation vals
Merge pull request #25 from Doik/monitors

Fixing TOL-16, TOL-17
Do not attempt to snapshot sensors when not connected
to a world
Merge branch 'master' of github.com:joschabach/micropsi2
fix overlay scaling
Merge pull request #24 from Doik/hovering

if compact, expand node on hover
fix position of new nodes in Firefox
Merge remote-tracking branch 'joscha/master'
fix node-hover-overlay
... fix hover overlay part 2
wording consistency
change node context menu sorting

(create after draw)
don't redraw Node if deleted in between
fix deleting nodespaces
sort nodetypes in context menu alphabetically
Easier reciprocal link creation in netapi and
new full-linking method
fix partial loading of nodenet