Binary builds of all the Palaso libraries are available from our Team City continuous build server.
To get the source code, you'll need Git. Then from a command line, give this command:
git clone https://github.com/sillsdev/libpalaso
For instructions on building and contributing, see https://github.com/sillsdev/libpalaso/wiki/Development.