Support searching solely by number

[jcscottiii]

Gap in functionality: Querying for numbers only returns a 400 error

There are some features that have numbers and if a user searches only for the numbers, it won't work because the grammar is specified as: '"' [a-zA-Z][a-zA-Z0-9_-]* [ ]* '"' | [a-zA-Z][a-zA-Z0-9_-]* so the first character needs to be a letter for now. Support searching solely by number