Update distribution archive (#544)
Update distribution archive (#544)

Pour some love onto "make dist" target.

- Name archive "themis_0.X.Y", not just "0.X.Y"

  It's much nicer to provide an archive with a proper name
  that produces nicely named directory when unpacked.

- Remove unnecessarily verbose options

  No one is really immediately interested in all the files that
  get packed. You can see them by unpacking it. However, people
  will be interested in the name of the produced tarball.

- Update distribution files

  The file list currently includes some files that are no longer
  need to be excluded, and misses some newly added project files
  (Carthage, Rust, Android, NSIS). Update the file list.

* Don't pack build systems for mobile platforms

We don't need to pack Gradle (Android), CocoaPods and Carthage (iOS)
because these platforms will not need the distribution tarball. They
already include Themis Core in them.
cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis,cossacklabs/themis