Updated Readme with initialization steps

I had a hard time getting started with the services mainly because it
wasn’t clear anywhere how to initialize the resolver.  So I put it in
the realm in a brief summary with links to the wiki.  Please make any
corrections you think are necessary.
Tweak my previous readme changes

I added some extra formatting to make things more readable.
Even more formatting tweaks

Wish I had a way to view this before committing.
Revert "Even more formatting tweaks"

This reverts commit d6c9293ac6a3b29b8cdad59832328e5b21533e9a.
Revert d6c9293..f2987ad

This rolls back to commit d6c9293ac6a3b29b8cdad59832328e5b21533e9a.
Revert "Even more formatting tweaks"

This reverts commit d6c9293ac6a3b29b8cdad59832328e5b21533e9a.
Revert d3222a9..ec40934

This rolls back to commit d3222a93a0a5df5fbf9704eda1fe907177aa2a82.
Revert 214c264..7c0d77c

This rolls back to commit 214c2648b1513f6a55ac457a91594e2d75dd8637.
Updated Readme with initialization steps

I had a hard time getting started with the services mainly because it
wasn’t clear anywhere how to initialize the resolver.  So I put it in
the readme file in a brief summary with links to the wiki.
Merge pull request #411 from sami1971/master

REST service moved to XLabs
Merge pull request #409 from irperez/master

I added a new section called "Initializing the Services"
Use InvalidOperationException
Merge pull request #419 from XLabs/fix-nre-resolver

Use InvalidOperationException fixes #413
On Android, the ItemSelected event wouldn't get raised. I added the implementation for it.
Merge pull request #421 from jacksierkstra/master

On Android, the ItemSelected event wouldn't get raised On the GridView control. I added the impl...
Merge pull request #1 from XLabs/master

Merge from main.
Added circle image control and renderers for iOS and Android.  Still working on Windows Phone.
Add back in folders that were somehow removed.
Merge pull request #423 from Bowman74/master

Added circle view and associated renderers for Android and iOS
Made changes to Readme.md for CircleImage view.