Added brand new (and still experimental) checks for CWEs 415 and 416 together with a new interprocedural data-flow analysis engine written in Rust. Add `-partial=Memory` as command line flag to try out the new checks.

Upgraded the BAP version to its current development version.

prepare v0.3 release

This builds cwe_checker and runs the test suite on Travis CI.

* reduced container size

* removed caching in install script

* size optimizations