It's possible to build the project from its component modules in either an IDE or from the command line.
The build system used for ximix is Gradle Instructions for installing it are available from the web site.
At the moment you need to create a libs directory in the root of the source tree and copy the latest beta of the Bouncy Castle APIs into it. You can get the beta from the Bouncy Castle betas area both the bcprov and bcpkix jar files are required. You can also get the build script to download the beta files by running gradle fetch_libs.
To generate JavaDoc for the API use the command gradle apiJavadoc.