Improves patterns for SYMBOL, TAG, and KEYWORD to more closely match the EDN specifications outlined here https://github.com/edn-format/edn. Updates tests as well.
Fixes regexes.
Adjusts regexes to pass additional tests from edn-tests.
Reverts test to the original version.
Merge pull request #13 from jashugan/master

Updates Symbol Parsing in edn_format