MSON Utility functions

Added an MSONUtility file which contains the following functions:

* parseValue
* parseSymbol
* parseTypeName
* parseTypeAttributes
* parse TypeSpecification
* parse TypeDefinition

Also adds `StripMarkdownLink` function to StringUtility file.
Per your own comments on others PR – you are inconsistent with new lines after `if () {` see https://github.com/apiaryio/snowcrash/pull/255/files#diff-0658d0f2be8d5522eabb708f259d1320R43