Add ClickOptions.OffSet and TapOptions

[amaitland]

Resolves #60
Resolves #62

[SorceryAdmin]

ok this may be a little tricky to explain but I will try.
Having this declarations:

public Dictionary<object, Delegate> UserActions = new Dictionary<object, Delegate>();

then declaring

    protected async Task InitializeDevToolsContext()
    {
         await submitBrowser.InvokeOnUiThreadIfRequired(async () =>
        {
            if (DevToolsContext == null)
                      DevToolsContext = await submitBrowser.CreateDevToolsContextAsync();
        
            
        });   
    }
UserActions.Add("TypeValue", (string querySelector, string value) => this.TypeValue(querySelector, value));
    public async Task TypeValue(string querySelector, string value)
    {
        try
        {
            await InitializeDevToolsContext();
            await submitBrowser.InvokeOnUiThreadIfRequired(async () =>
            {
                await DevToolsContext.QuerySelectorAsync(querySelector);
                await  DevToolsContext.TypeAsync(querySelector,value);
            });
        }
        catch(Exception err) {
                ErrorReporter(err);
           }

    }

then when executed

UserActions["TypeValue"].DynamicInvoke(arguments.ToArray());

QuerySelectorAsync just hangs and never comes back and when it works the exceptions just kill this.

[amaitland]

Tests are passing for the new features, some other failing tests that will be addressed in #59