Fixing issue #132

Switch hashing algorithm in ADAL desktop to a FIPS compliant one
<a href='#crh-start'></a><a href='#crh-data-%7B%22processed%22%3A%20%5B%22https%3A//github.com/AzureAD/azure-activedirectory-library-for-dotnet/pull/133%23issuecomment-66380378%22%2C%20%22https%3A//github.com/AzureAD/azure-activedirectory-library-for-dotnet/pull/133%23issuecomment-66546821%22%5D%2C%20%22comments%22%3A%20%7B%22General%20Comment%22%3A%20%7B%22html_url%22%3A%20%22https%3A//github.com/AzureAD/azure-activedirectory-library-for-dotnet/pull/133%23issuecomment-66380378%22%2C%20%22comments%22%3A%20%5B%7B%22body%22%3A%20%22Can%20try%20SHA256Cng%3F%20SHA256CryptoServiceProvider%20uses%20CAPI%2C%20CNG%20is%20the%20latest%20moving%20forward.%22%2C%20%22created_at%22%3A%20%222014-12-09T23%3A43%3A59Z%22%2C%20%22user%22%3A%20%7B%22avatar_url%22%3A%20%22https%3A//avatars.githubusercontent.com/u/3172421%3Fv%3D3%22%2C%20%22html_url%22%3A%20%22https%3A//github.com/brentschmaltz%22%7D%7D%2C%20%7B%22body%22%3A%20%22Switched%20to%20SHA256Cng%22%2C%20%22created_at%22%3A%20%222014-12-10T23%3A51%3A09Z%22%2C%20%22user%22%3A%20%7B%22avatar_url%22%3A%20%22https%3A//avatars.githubusercontent.com/u/3790715%3Fv%3D3%22%2C%20%22html_url%22%3A%20%22https%3A//github.com/afshins%22%7D%7D%5D%2C%20%22title%22%3A%20%22General%20Comment%22%7D%7D%7D'></a>
<a href='https://www.codereviewhub.com/'><img src='http://www.codereviewhub.com/site/github-bar.png' height=40></a>
- [ ] <a href='#crh-comment-General Comment'></a> <img src='http://www.codereviewhub.com/site/github-remaining.png' height=16 width=60>&nbsp;<b><a href='https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/pull/133#issuecomment-66380378'>General Comment</a></b>
- <a href='https://github.com/brentschmaltz'><img border=0 src='https://avatars.githubusercontent.com/u/3172421?v=3' height=16 width=16'></a> Can try SHA256Cng? SHA256CryptoServiceProvider uses CAPI, CNG is the latest moving forward.
- <a href='https://github.com/afshins'><img border=0 src='https://avatars.githubusercontent.com/u/3790715?v=3' height=16 width=16'></a> Switched to SHA256Cng


<a href='https://www.codereviewhub.com/AzureAD/azure-activedirectory-library-for-dotnet/pull/133?mark_as_completed=1'><img src='http://www.codereviewhub.com/site/github-mark-as-completed.png' height=26></a>&nbsp;<a href='https://www.codereviewhub.com/AzureAD/azure-activedirectory-library-for-dotnet/pull/133?approve=1'><img src='http://www.codereviewhub.com/site/github-approve.png' height=26></a>&nbsp;<a href='https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/pull/133'><img src='http://www.codereviewhub.com/site/github-refresh.png' height=26></a>
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