added MaterialKit.h header file

Source/MaterialKit.h

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#import <UIKit/UIKit.h>
+
+//! Project version number for MaterialKit.
+FOUNDATION_EXPORT double MaterialKitVersionNumber;
+
+//! Project version string for MaterialKit.
+FOUNDATION_EXPORT const unsigned char MaterialKitVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <MaterialKit/PublicHeader.h>