Merge remote branch 'upstream/master'
Merge remote branch 'brent/master'
Wired up top level analyze.py
Fixed graph_writer tests for new output stat format
Added text output for min/max/avg/stddev in PDF
Re-aligned pdf output
Error handling for input dir
Merge remote branch 'upstream/master'
Converted model objects to JSONSerializable
Fixed bug with output_dir
Separate snapshots into separate files
Merge pull request #8 from wholevin/master

Wire up top level binary and fix some tests