Bring back the simple Makefile

For those who don't want to deal with autotools, provide the old way of
building 4deckradio.
Provide dummy ChangeLog
Direct users from README to README.md
[README] Mention autotools build system

Update README.md to reflect the two new ways of building 4deckradio.
[autotools] Fix gstreamer config flag

Patch by Karl Lindén
Merge branch 'master' of https://github.com/adiknoth/4deckradio