genn-team/genn: GeNN 3.1.0

This release builds on the changes made in 3.0.0 to further streamline the process of building models with GeNN and includes several bug fixes for certain system configurations.

• Support for simulating models described using the SpineML model description language with GeNN.
• Neuron models can now sample from uniform, normal, exponential or log-normal distributions - these calls are translated to cuRAND when run on GPUs and calls to the C++11 <random> library when run on CPU.
  • Model state variables can now be initialised using small snippets of code run either on GPU or CPU. This can save significant amounts of initialisation time for large models.
  • New MSBuild build system for Windows - makes developing user code from within Visual Studio much more streamlined.

• Workaround for bug found in Glibc 2.23 and 2.24 which causes poor performance on some 64-bit Linux systems (namely on Ubuntu 16.04 LTS).
• Fixed bug encountered when using extra global variables in weight updates.
• Fixed bug in SpineML code generation found in 3.1.0RC