Merge pull request #92 from matthewleon/master

#50 eliminate warnings
remove print statements
add exceptions for warnings
ca_ab_edmonton: scraping mayor tel numbers changed
see what happens if we uncomment image validation
Merge pull request #93 from matthewleon/master

ca_nt scraper, fixes #90
Merge pull request #94 from matthewleon/master

more scraper fixes
fix riding mismatch
remove ca_qc_candidates
Merge pull request #95 from matthewleon/master

Ontario scraper fixes
Merge pull request #96 from matthewleon/master

more Ontario scraper fixes
update constants.py
update constants