Fix commit e21166a1 - variable expansion within a string needs double quote
Improve 'td update' message for gems
Replace import:java_version with import:jar_version. Keep import:java_version as an alias for backward compatibility.
VERSION variable renamed TOOLBELT_VERSION
CLT-163 & CLT-144 implement jar autoupdater

Changes:
- update the jar file if import:prepare, import:upload, or
  import:auto are used. This is limited to once per hour;
- move most of the jar updater logic from import.rb to
  updater.rb;
- download toolbelt update zip file in stream mode;
- remove td-import.jar, td-import-java.version, and VERSION
  file from the repository
- only use UPDATED_PATH for storing and retrieving the above
  mentioned files. Only use BASE_PATH (not renamed INSTALLED_PATH)
  for the logging.properties file.
Fix VERSION test