Keyvi

- allowing keys with internal nul chars in rust bindings(220)

- fix potential segfault in keyvi index caused by bug in parallel sorting, see 215
- add fuzzy matching support to keyvi index
- support windows/msvc for kevyi core

- fix a memory limit configuration issue(205)
- add a zip state traverser and re-factor fuzzy matching (204)

Less is more, keyvi 0.5.0 features:

- simplify msgpack<-> json parsing
- simplify dictionary compiler, no more "small" dictionary compilers
- use 1 dictionary compiler for all use cases which overflows to disk on demand
- removal of dependencies on xchange and TPIE
- smaller code base, reduced build time and smaller binaries
- removal of python 3.5 (EOL) package, new package for python 3.9

- support for aarch64 was added (168)

- (Rust) changed return type of `Dictionary::new()` from `Result<Dictionary, &str>` -> `io::Result<Dictionary>` to be more consistent with other libraries and make error handling easier. (166)