Sed scripts to fix blank lines and whitespace; helps code comply with PEP8

gistfile1.sh

# Removes whitespace chars from blank lines
pep8 -r --select=W293 -q --filename=*.py /usr/local/src/madrona/madrona/ | xargs sed -i 's/^[ \r\t]*$//'

# Removes trailing blank lines from files
pep8 -r --select=W391 -q --filename=*.py /usr/local/src/madrona/madrona/ | xargs sed -i -e :a -e '/^\n*$/{$d;N;ba' -e '}'

# Squashes consecutive blanks lines into one
pep8 -r --select=E303 -q --filename=*.py /usr/local/src/madrona/madrona/ | xargs sed -i '/./,/^$/!d'

# confirm
pep8 -r --select=W391,W293,E303 -q --filename=*.py /usr/local/src/madrona/madrona/