v1.0-alpha

Changelog:

• Added SDL_Renderer backend (SDL + SDL_ttf)
• Added GLFW/OpenGL backend (glfw3 + OpenGL >= 3.3 or GLES >= 2.0)
• Added SFML/OpenGL backend (sfml-window + OpenGL >= 3.3)
• Existing SFML-Graphics and SDL/OpenGL backends were redesigned
• Black, BabyBlue and TransparentGrey themes can now be used for all widgets
• ClientSize of ChildWindow can now be a layout instead of only a constant
• Typing in FileDialog now selects the first file starting with the typed letter
• TextSize can now also be set in theme file
• Added moveWithAnimation and resizeWithAnimation functions to Widget
• Added case-insensitive variants of startsWith and endsWith to String
• Textures can now be loaded from base64 string
• ListView columns can now be resizable
• ListView icons can also be saved in form file
• Position of text in buttons can now be changed
• Added changeMenuItem function to MenuBar to change the text of a menu
• Added SizeHorizontal and SizeVertical mouse cursors
• Added hasUserData to Widget
• Added LabelAlignment and ButtonAlignment to MessageBox
• Added ScrollbarValue to Label
• Theme files now support global properties
• Theme files now support inheritance between sections
• Tool tips are now shown on disabled widgets by default
• Word-wrapped lines no longer begin with whitespace
• Filter CR in TextArea to prevent issues when pasting CRLF on Windows