Merge pull request #408 from sortega/backport_fix_version

Backport fix version
Fix paths on JFX.pkgResourcesDir

Avoid using “/“ directly to be OS independent.
Merge pull request #410 from sortega/backport_windows_paths

[Backport] Fix paths on JFX.pkgResourcesDir
Fix coinffeine-server README detail
Add coinffeine-headless module
Merge pull request #411 from sortega/headless

Add coinffeine-headless module
Implement a jline-based shell class
Add MutableProperty.update

And implement MutableProperty.set as a particular case of update.
Report the connection status on the shell prompt
Merge pull request #412 from sortega/headless

Add a shell with an informative prompt
Fix logging

Reduce logging initialisation verbosity and log only to file to make
the shell usable.
Remove unused CoinffeineWallet.importPrivateKey
Expose a writer on Command execution
Enable jline auto completion
Add a basic status command

Just balance information for now
Merge pull request #413 from sortega/headless

Add a basic status command and fix logging