[META] Release v1.5: Watch Your Language

[msm-code]

Mquery is nearing a new release, and ursadb scored quite a few features in the meantime too.

This release has a lot of improvements in the internals. The focus is on improving support for wildcards and more advanced queries. Support for tags was also added.

Already done:

• Create ursacli, a cli tool for ursadb written in C++ #48
• Implement alternatives in the ursadb query syntax #65
• Implement query graph pruning #67
• Better support for wildcards #23
• Ensure ursadb is thread safe #32
• Add a new command: index with taints #31

Still missing:

• Reindexing caused a zmq protocol violation #66
• Update the documentation #33