Use EOS instead of Lift for unit tests

* test/protocol.lisp: new file; contains initial unit smoke test
* test/package.lisp: new file; package definition for unit tests
* print-items.asd (system print-items-test): changed system dependency
  lift -> eos
* lift-standard.config: removed; no longer needed
Initial README draft in README.org

* README.org (Introduction): initial draft
Renamed system print-items -> utilities.print-items

* src/protocol.lisp (header): changed one-line description
* src/util.lisp: likewise
* src/package.lisp: likewise
* test/protocol.lisp (header): changed one-line description
  (in-suite utilities.print-items): changed print-items ->
  utilities.print-items
* test/package.lisp (header): changed one-line description
  (def-suite utilities.print-items): changed print-items ->
  utilities.print-items
  (run-tests): adapted suite name
* utilities.print-items.asd: renamed print-items.asd ->
  utilities.print-items.asd
  (package utilities.print-items-system): renamed print-items-system
  -> utilities.print-items-system
  (system utilities.print-items): renamed print-items ->
  utilities.print-items
  (system utilities.print-items-test): renamed print-items-test ->
  utilities.print-items-test
* README.org: changed print-items -> utilities.print-items
Fixed version constants in utilities.print-items.asd

* utilities.print-items.asd (+version-major+): changed defconstant ->
  defparameter
  (+version-minor+): likewise
  (+version-revision+): likewise
Added README.org as static-file in utilities.print-items.asd

* utilities.print-items.asd (system utilities.print-items): added
  README.org as static-file