Merge pull request #11 from theZacAttacks/elephrame-rewrite

bumped elephrame version

fixed cancel command

added constant for receipt command info

rearranged constants

moved helper functions into their own file

bumped to new elephrame version

finished rewrite? needs testing

rewrote error message to point to using the !help command

reworked commands into elephrame Command bot

renamed app.rb to main.rb

added !until information into receipt and !help message

added in !until command

Update README.md

fixed old language in the readme