Allowing for old-style state.txt and new-style linked state.txt
Updated summary output
Updated index output
Tweaked small-screen rendering of output state
Finally added a .gitignore
Stubbed out excerpt code for sample datasets
Bashed in basic data samples

Ultimately, use code from https://github.com/openaddresses/machine/commit/ce43a30447da but
for now address https://github.com/openaddresses/machine/issues/8 closer to master branch.
Including bad URLs of sample data in state.txt
Added output date display to summary page
Added inline display of sample data from each source