New features including GPU shaders

[yoyoberenguer]

VERSION 1.0.5

Bug correction in shader_median_filter24_inplace_c Bug correction in shader_plasma24bit_inplacec (replace t by t) Bug correction in fisheye lens (different width and height causing an exception)

Added CPU shader bilinear filter Added CPU shader alpha_blending Added CPU shader Light effect 24 bit Added CPU shader_bloom_fast (much faster) Added CPU bug corrected in fisheye lens (different width and height would have cause an exception)

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Added GPU shader invert Added GPU shader sepia Added GPU shader bpf Added GPU shader grayscale Added GPU shader median Added GPU shader gaussian Added GPU shader sobel Added GPU shader prewitt Added GPU shader canny Added GPU shader color_reduction Added GPU shader hsv Added GPU shader downscale array & upscale array Addef GPU shader bloom low performance, to be re-written Added GPU shader cartoon Added GPU shader blending Added GPU shader sharpen Added GPU shader ripple Added GPU shader mirroring Added GPU shader saturation Added GPU shader bilateral filter Added GPU shader emboss Added GPU shader Light effect Added GPU shader brightness Added GPU shader saturation Added GPU shader hsl Added GPU shader fisheye Added GPU shader swirl Added GPU shader wave