Update ca-pe-prince.json

Found new source.
Added script to search for U.S. county data
Applied U.S. county data
Selectively applied further U.S. County data, where names matched
Moved misnamed files for Vermilion, IL and Doña Ana, NM
Tweaked prefix search, to shorten line length
Corrected Berkeley, CA and Pima County, AZ
Corrected Oakland, CA and Miami-Dade County, FL
Corrected Orange County, FL and Pinellas County, FL
Corrected Palm Beach County, FL
Corrected Sioux County, IA and Clarke County, IA
Corrected Marion County, IN and updated Chicago, IL
Corrected Sedgwick County, KS and Fayette County, KY
Corrected Lake County, MT, Wake County, NC, and Orleans Parish, LA
Corrected Omaha, NE and Washoe County, NV
Unset executable bits on several files.

CONTRIBUTING.md, LICENSE, README.md, package.json,
sources/(us-ca-yolo, us-tx-denton).json
	-Remove executable permissions from files that don't have any
	need for them (they were added to all of the above files, except
	`sources/us-ca-yolo.json`, which was committed with them, in
	a864f8e).
Remove trailing whitespace in *.js; del swap file.

sources/us-ny.json~
	-Remove a swap file.

stats.js, test/sources.js
	-Remove trailing whitespace and superfluous empty lines.
Unset executable bits on two more files.

.gitignore, .travis.yml
	-Remove unnecessary executable permissions.
	-Missed these in 026e901.
Merge pull request #383 from sevko/master

Unset executable bits and clean up whitespace
Merge pull request #376 from MAL315/patch-10

Update ca-pe-prince.json