src: update version to 0.5

Changed since v0.4:
  - added a license file
  - added build rules for ALT Linux
  - improved detection of some CP2102 devices
  - small doc cleanups

src: update version to 0.4

Changed since v0.3:
  - optional remapping of lone LF/CR to CRLF (-L, BT_PORT_CRLF)
  - automatically abort escape after 2 seconds
  - flash the terminal when escape is aborted

src: update the version to 0.3.0

There were sufficient updates to warrant a new release.

src: do not wait when -l is used

bt -l is used to list currently detected ports, so we don't want it to
wait for new ports to be detected. This is especially important when
BT_SCAN_WAIT_ANY is already set as an environment variable.

src: declare version 0.1

It's reasonably complete now, let's tag it 0.1.