private async void btnLookup_Click(object sender, EventArgs e)
{
btnLookup.Enabled = false;
var ninjaTerms = await Ninja.GetTermsAsync(txtTerm.Text);
richTextBox.Text = GetStringFromTerms(ninjaTerms);
webBrowser.Navigate(Ninja.Host + "/" + txtTerm.Text);
btnLookup.Enabled = true;
}