Can't get whole string if start with number

[jma1987]

Please ensure the following information is supplied for new issues:

• Riak Node.js Client version
  2.4.0
• Node.js version
  6.11.3
• Riak version
  Unknown
• Operating System / Distribution & Version
  MAC
• Riak error.log file, if applicable
• What commands were being executed during the error
  Search.prototype.onSuccess = function(rpbSearchQueryResp)
• What you expected to have happen
  We can't get whole string if it's start with number. For example 123abc, we get 123 when executing search.
  Root cause is we need to check it's a whole number or not first.
  The method is "function maybeIsNumber(n)" in utils.js.
  Please see my pull request. Fix string start with number issue #188

Thank you!