Merge pull request #68 from kodujdlapolski/master

pl translations
Update README.md
Update README.md
Update README.md
Update README.md
Update index.html
update index.html
new/updated scheme(s) 91,116,13,126,127,128,129,130,131,132,134,135,136,137,138,139
update interchanges.csv
new/updated scheme(s) 127,128
new/updated scheme(s) 128
new/updated scheme(s) 128
new/updated scheme(s) 143
new/updated scheme(s) 143
update index.html
update index.html
stairs graphs added for transfers
Zero condition fixed

GT zero condition changed to GTE zero for transfers and stations filtering
fix closed exits
update portals.csv