Create readme for design temp directory and add Energy Star PDF to gi…

…t lfs (codeforboston#97)

.gitattributes

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+design_temp/ENERGY[[:space:]]STAR[[:space:]]Certified[[:space:]]Homes[[:space:]]County-Level[[:space:]]Design[[:space:]]Temperature[[:space:]]Reference[[:space:]]Guide.pdf filter=lfs diff=lfs merge=lfs -text

design_temp/README.md

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+The Energy Star PDF contains design temperatures by US county. The PDF was downloaded from:
+https://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/County%20Level%20Design%20Temperature%20Reference%20Guide%20-%202015-06-24.pdf
+and copied into pdf_rawcopy.txt. To allow copying, it was downloaded by using Google Chrome, using
+the 'print' option and saving it as a PDF.
+
+The script clean.py generates design_temp_by_county.csv from pdf_rawcopy.txt

design_temp/clean.py

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 from dataclasses import dataclass
 
 
-# This script generates design_temp_by_county.csv
-# from the raw text copied from the ENERGY STAR pdf located at:
-# https://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/County%20Level%20Design%20Temperature%20Reference%20Guide%20-%202015-06-24.pdf
-# To copy the text from the PDF you can open it in chrome and select the 'print' option
-# to save it as a PDF that will allow copying
-
-
 # Number of counties (according to PDF) for each of the 50 states and for DC
 # Same order as PDF
 REGIONS = {