enable proposals and add Introverts and Tech Conferences
Add additional talks for Chicago
Update propose page for Chicago with guidelines for submitting
Fix Chicago propose page issue with markdown
Fix Chicago propose page issue extra h4
remove author from proposal
override introvert proposal with msp template for chicago
Anonymize speakers for Chicago proposals
Update homepage copy for Chicago to present tense
Fix typo on Chicago proposals page
Merge pull request #1052 from mattstratton/master

Updates for Chicago, including talk proposals and minor typos