add multiple hashtags
merging master with multiple-hashtags

Merge branch 'master' of https://github.com/anirudh-eka/dashtag into multiple-hashtags
add EnvironmentService header_title
modify API_RATE to handle multiple hashtags
modify README to handle new env variables
refactor header_title tests
Merge pull request #57 from anirudh-eka/multiple-hashtags

Multiple hashtags