Added new methods to set uniforms in sf::Shader

Implements a new design for the shader uniform API.
* Added Shader::setUniform() and Shader::setUniformArray() overloads for the following types:
  -> scalars: float, int, bool
  -> vectors: 2D, 3D, 4D
  -> matrices: 3x3, 4x4
  -> arrays of basic types
  -> samplers (sf::Texture)
  -> conversions for SFML types (sf::Transform, sf::Color)
* Added sf::Glsl namespace with GLSL-equivalent types
* Deprecated Shader::setParameter() overloads

Other related changes:
* Refactored sf::Shader internals to avoid code duplication
* Improved documentation
* Added SFML_DEPRECATED macro to Doxyfile
* Defined _SCL_SECURE_NO_WARNINGS to disable std::copy() warnings on MSVC

doc/doxyfile.in

@@ -2000,7 +2000,9 @@ PREDEFINED             = SFML_SYSTEM_API \
                          SFML_NETWORK_API \
                          SFML_WINDOW_API \
                          SFML_AUDIO_API \
-                         SFML_GRAPHICS_API
+                         SFML_GRAPHICS_API \
+                         SFML_DEPRECATED \
+                         SFML_DOXYGEN
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The