Nice 500 error page
fixes #13
refactor zoom and dashboard loading
remove unnecessary variables
light api, returns Graphite URL + Leonardo properties as JSON.
fixes #26 : Now the path is clear on the front side
to try to implement Rickshaw / HighCharts
add Single graph feature and fix selected date bug
Now the "detailed" page graphs are clickable. They link
to one and only big graph, on which you can choose the time period.
Makes me think the detailed page is less relevant now,
we might consider removing it.

Also the bootstrap nav pills for date selection become active when used.