remember the nodespace in a cookie
remember the zoomFactor in a cookie
get rid of the confusing "currentNodespace"

it's always set to the global "currentNodeSpace" anyway
remove unused viewProperties
fix bug in selection

(selecting a node, then selecting a link failed)
be defensive against cookies w/ outdated nodspaces

since we're saving the nodespace in a cookie we need to default to "Root" if the nodespace from the cookie doesn't exist in the selected nodenet
the frontend expects some return value (not null)
facepalm commit fixes typo m(
Merge pull request #21 from Doik/remember_nodespace

Remember nodeSpace, zoomFactor