rename: Command -> abs.Command, ListCommand -> abs.ListCommand.

* src/dctc/java/com/dataiku/dctc/command/Command.java,
  src/dctc/java/com/dataiku/dctc/command/ListCommand.java: From here...

* src/dctc/java/com/dataiku/dctc/command/abs/Command.java,
  src/dctc/java/com/dataiku/dctc/command/abs/ListCommand.java: ...To here.

* src/dctc/java/com/dataiku/dctc/Main.java,
  src/dctc/java/com/dataiku/dctc/command/AddAccount.java,
  src/dctc/java/com/dataiku/dctc/command/Cat.java,
  src/dctc/java/com/dataiku/dctc/command/Cmp.java,
  src/dctc/java/com/dataiku/dctc/command/Cp.java,
  src/dctc/java/com/dataiku/dctc/command/Dispatch.java,
  src/dctc/java/com/dataiku/dctc/command/Edit.java,
  src/dctc/java/com/dataiku/dctc/command/Find.java,
  src/dctc/java/com/dataiku/dctc/command/Grep.java,
  src/dctc/java/com/dataiku/dctc/command/Head.java,
  src/dctc/java/com/dataiku/dctc/command/ListColumns.java,
  src/dctc/java/com/dataiku/dctc/command/Ls.java,
  src/dctc/java/com/dataiku/dctc/command/Mkdir.java,
  src/dctc/java/com/dataiku/dctc/command/Mv.java,
  src/dctc/java/com/dataiku/dctc/command/Rm.java,
  src/dctc/java/com/dataiku/dctc/command/Rmdir.java,
  src/dctc/java/com/dataiku/dctc/command/Sync.java,
  src/dctc/java/com/dataiku/dctc/command/Tail.java,
  src/dctc/java/com/dataiku/dctc/command/Version.java,
  src/dctc/java/com/dataiku/dctc/file/FTPFileBuilder.java,
  src/dctc/java/com/dataiku/dctc/file/SshFile.java,
  src/dctc/test/com/dataiku/dctc/command/CatTest.java: Adjust.
clean: Imports.

* src/core/java/com/dataiku/dip/utils/StreamReplacementReader.java:
  Remove unused.
Tell to grep to don't output instead of output redirection.

* dctc-jar.sh: Clean by use the -q options.
clean: Imports.

* src/dctc/java/com/dataiku/dctc/Main.java: Use wildcards.
rename: ListCommand -> ListFilesCommand.

* src/dctc/java/com/dataiku/dctc/command/abs/ListCommand.java: From here...
* src/dctc/java/com/dataiku/dctc/command/abs/ListFilesCommand.java: ...to here.

* src/dctc/java/com/dataiku/dctc/command/Cp.java,
  src/dctc/java/com/dataiku/dctc/command/Dispatch.java,
  src/dctc/java/com/dataiku/dctc/command/Mv.java: Adjust.
clean: Comments.

* src/dctc/java/com/dataiku/dctc/command/Cat.java,
  src/dctc/java/com/dataiku/dctc/command/Cmp.java,
  src/dctc/java/com/dataiku/dctc/command/Cp.java,
  src/dctc/java/com/dataiku/dctc/command/Dispatch.java: Here.
sync: Add missing switch statement.

* src/dctc/java/com/dataiku/dctc/copy/SyncComputer.java: Add SIZE_ONLY
  switch case.