Support for razor html and code html as well as line numbers

[chanan]

API:

<PrettyCode CodeFile="uri" />

This will do exactly what CodeFile did previously

<PrettyCode CodeFile="uri" CodeSectionFile="uri2" />

This will append the contents of CodeSectionFile below CodeFile. If CodeSectionFile is not wrapped with: @code { } then it will be wrapped automatically.

Line numbers are also supported:

<PrettyCode 
   CodeFile="uri" 
   CodeFileLineNumbers="1-50"
   CodeSectionFile="uri2"
   CodeSectionFileLineNumbers="52,55-60"
/>

If CodeSectionFile is not defined but CodeSectionFileLinesNumbers is defined, then it will be assumed that the code section is in the same file as CodeFile