Production Ready Release

New features since previous release:

• Implemented iCloud Document to sync thoughts across user's devices.
• Added the capability to search for thoughts
• Changed the overall color theme.
• Moved several controls previously on the navigation bar to the toolbar for easy access.
• Used a better markdown parser.
• Added swipe gestures to navigate around.
• Replaced all buttons' labels w/ icons.
• Added an About page to give credits.
• Hid navigation bar and tool bar when scrolling to give more reading space.
• Changed the 3rd party alert controller library.
• Changed app's icon.
• Added word counter on navigation bar.
• Added launch screen.
• Improved the logic of detecting unsaved data.
• Replaced WKWebView w/ SFSafariViewController.
• Added pull-to-refresh functionality.