v0.3.0

New features:
- new command 'rawsplit'
  commit b77970c0db7b9afb94cbb382a74af36acd5e73d6
- signals can be specified in arbitrary order
  commit 295a4e95a877b0ae2fe273a2371bdccb39bca25b
- message with --implicit-address
  commit 15ca98d8e4d969988bf75d85899cc76b4d51fbd1

Bugfixes:
- handle ValueError I/O operation on closed file
  commit f18db98eb6637d28c6585c69c57857705f9ca91f