upped cmake requirement to match C++11 support

CMakeLists.txt

-cmake_minimum_required(VERSION 2.6)
+cmake_minimum_required(VERSION 3.1.3)
 
 set(CMAKE_BUILD_TYPE Debug CACHE STRING "Choose the type of build (Debug or Release)")
 if ( NOT CMAKE_INSTALL_PREFIX )
 
 include_directories("${PROJECT_BINARY_DIR}")
 
-add_definitions(-DSLOP_VERSION="v5.3.36")
+add_definitions(-DSLOP_VERSION="v5.3.37")
 
 # The names have to be unique unfortunately.
 set(EXECUTABLE_NAME "slop")
                                     src/xshaperectangle.cpp
                                     src/glrectangle.cpp)
 
-set_property(TARGET ${LIBRARY_NAME} PROPERTY CXX_STANDARD 11)
 set_property(TARGET ${LIBRARY_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
+set_property(TARGET ${LIBRARY_NAME} PROPERTY CXX_STANDARD 11)
 
 add_executable(${EXECUTABLE_NAME} src/options.cpp
                                   src/main.cpp)
 
+set_property(TARGET ${EXECUTABLE_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
 set_property(TARGET ${EXECUTABLE_NAME} PROPERTY CXX_STANDARD 11)
 
 set( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/modules" )

README.md

 
 The files listed to the right of the `|` are the required files for the command to the left to work correctly.
 * `slop -rblur1,blur2 -b100` | `~/.config/slop/{blur1,blur2}{.frag,.vert}`
+
 ![slop blur](https://my.mixtape.moe/bvsrzr.png)
 
 * `slop -rwiggle -b10` | `~/.config/slop/wiggle{.frag,.vert}`
+
 ![slop animation](http://i.giphy.com/12vjSbFZ0CWDW8.gif)
 
 And all together now...
-
 * `slop -rblur1,blur2,wiggle -b50 -c1,1,1` | `~/.config/slop/{blur1,blur2,wiggle}{.frag,.vert}`
+
 ![slop animation](http://i.giphy.com/kfBLafeJfLs2Y.gif)
 
 Finally here's an example of a magnifying glass.
 * `slop -rcrosshair` | `~/.config/slop/crosshair{.frag,.vert}`
+
 ![slop animation](http://i.giphy.com/2xy0fC2LOFQfm.gif)
 
 It's fairly easy to adjust how the shaders work by editing them with your favourite text editor. Or even make your own!

shaderexamples/blur1.frag

     color += texture2D(desktop, upsideDownUV - (off2 / screenSize)) * 0.09447039785044732;
     color += texture2D(desktop, upsideDownUV + (off3 / screenSize)) * 0.010381362401148057;
     color += texture2D(desktop, upsideDownUV - (off3 / screenSize)) * 0.010381362401148057;
-    gl_FragColor = (texture2D(texture, uvCoord) * color);
+    vec4 tcolor = vec4(0.0);
+    tcolor += texture2D(texture, uvCoord) * 0.1964825501511404;
+    tcolor += texture2D(texture, uvCoord + (off1 / screenSize)) * 0.2969069646728344;
+    tcolor += texture2D(texture, uvCoord - (off1 / screenSize)) * 0.2969069646728344;
+    tcolor += texture2D(texture, uvCoord + (off2 / screenSize)) * 0.09447039785044732;
+    tcolor += texture2D(texture, uvCoord - (off2 / screenSize)) * 0.09447039785044732;
+    tcolor += texture2D(texture, uvCoord + (off3 / screenSize)) * 0.010381362401148057;
+    tcolor += texture2D(texture, uvCoord - (off3 / screenSize)) * 0.010381362401148057;
+    gl_FragColor = (tcolor * color);
 }