Usability improvements in CKReleaser

[Wiktor Walc]

Originally reported by Alfonso in #3546

  - The "Creating documentation..." step takes quite a while. If isn't
 possible to output something during that process I would put a warning
 ("Please wait, it might take some minutes.")

  - After that the "Checking compressed code..." is repeated over and over
 again. It should state which file is checking or simply adding a dot like
 other steps so it's nicer and don't lead to think that it has started an
 endless loop. Also it will allow to check previous messages instead of
 filling the screen buffer.

Plus:

• it should be also much easier to run CKReleaser in a verbose

mode (release.bat -v should enable verbose mode)

• package.sh should start CKPackager in verbose mode just like package.bat

• CKPackager in verbose mode should list paths instead of file names (it shows plenty of plugin.js which is rather useless in debugging)

[Wiktor Walc]

The attached .jar files are just to make testing 3597_ckpackager.patch and 3597_ckreleaser.patch easier.

Patch from #3546 is not included.

[Frederico Caldeira Knabben]

I'm not really running the code, but I think the changes are minor and are ok. The patch needs to be adapted to the current code and then run to see if works well. This can be done on commit, directly.