Modify README.md for github (links, issues etc)

Signed-off-by: Alexander Karatarakis <[email protected]>

Author: alexkaratarakis

README.md

@@ -4,7 +4,7 @@ The C++ REST SDK is a Microsoft project for cloud-based client-server communicat
 
 ## Getting Started
 
-Are you new to the C++ Rest SDK? To get going we recommend you start by taking a look at our [tutorial](https://casablanca.codeplex.com/wikipage?title=Http%20Client%20Tutorial) to use the http_client. It walks through how to setup a project to use the C++ Rest SDK and make a basic Http request. Other important information, like how to build the C++ Rest SDK from source, can be located on the [documentation](https://casablanca.codeplex.com/documentation) page.  
+Are you new to the C++ Rest SDK? To get going we recommend you start by taking a look at our [tutorial](https://github.com/Microsoft/cpprestsdk/wiki/Getting-Started-Tutorial) to use the http_client. It walks through how to setup a project to use the C++ Rest SDK and make a basic Http request. Other important information, like how to build the C++ Rest SDK from source, can be located on the [documentation](https://github.com/Microsoft/cpprestsdk/wiki) page.  
 
 ## What's in the SDK:
 
@@ -16,9 +16,9 @@ Are you new to the C++ Rest SDK? To get going we recommend you start by taking a
 
 ## Contribute Back!
 
-Is there a feature missing that you'd like to see, or found a bug that you have a fix for? Or do you have an idea or just interest in helping out in building the library? Let us know and we'd love to work with you. For a good starting point on where we are headed and feature ideas, take a look at our [requested features and bugs](https://casablanca.codeplex.com/workitem/list/advanced).  
+Is there a feature missing that you'd like to see, or found a bug that you have a fix for? Or do you have an idea or just interest in helping out in building the library? Let us know and we'd love to work with you. For a good starting point on where we are headed and feature ideas, take a look at our [requested features and bugs](https://github.com/Microsoft/cpprestsdk/issues).  
 
-Big or small we'd like to take your [contributions](https://casablanca.codeplex.com/wikipage?title=Make%20a%20contribution&referringTitle=Documentation) back to help improve the C++ Rest SDK for everyone. If interested contact us askcasablanca at Microsoft dot com.  
+Big or small we'd like to take your [contributions](https://github.com/Microsoft/cpprestsdk/wiki/Make-a-contribution-and-report-issues) back to help improve the C++ Rest SDK for everyone. If interested contact us askcasablanca at Microsoft dot com.  
 
 ## Having Trouble?