ecap-tcl v0.2.1

This is a bug fix release.

Fixes:

• New command (action content bytelength). Changed "action
  header add/set" to remove any previously defined header with the same name
  before adding a new one.
• host->useAdapted() is called in noteVbContentDone(),
  so as headers can be modified by "contentDone". Modifications to the headers
  done by "actionStop" will be lost.