Added an ignore file for git copied over from mywalkthrough.
Initially loading graphs now only makes one ajax call per graph group instead of two.
Fixed confilict with git ignore file when merged with remote/optimize.
graph zooms are now independant and do not set the start/end time ranges.
Add reset zoom buttons for each graph.
Overview get's selected to show zoom area of graph and deselects with zoom reset button.
Merge branch 'optimize' of github.com:visgence/portcullis into graphOpt