17.3.1.501-1

• Update Mesa3D to 17.3.1.
• Information about build environment and configuration is available here

User guide

• Expanded installation and usage section.
• Created a package contents section.
• Split tutorial about environment variables in its own section as it is relevant for both swr driver and manual GL context configuration.
• Add a swr driver use example.

Build script documentation

• Visual Studio components related enhancement.

Misc

• Add a detailed report about build environment and configuration.