Adds request echo mode to Webserver/Client.pm

Useful to debug from posts and other requests (alpha)
Adds experimental SSI/SHTML mode (via CGI::SHTML)
Use local version of SHTML module

Had to add some changes to run under windows/webmerge.
Turn these changes into a module that inherits from SHTML.
Add special DOM root node feature to SSI include

Only include subparts of html pages into the source file.
Very useful to develop prototypes and component galleries.
The selector for the root uses the jQuery syntax (pQuery).
Adds webserver example (with emphasis on SSI includes)
Appends slash to directories in directory listings
Adds more error handling to installer script

Will hopefully catch the issues with setting global path
Calls uninstaller before installing new version
Adds clean up of webmerge-version.txt in uninstaller
Renamed installer files to shorter name
Improves current git tag fetching

Non annotated tags would not be considered otherwise
Adds script to fetch current portables for rebuild
Corrects directory handling for SSI

Also sets the host environment variable now.
Adjusts installer url in README.md for webserver branch
Adds missing function import to Prepare.pm
Disables (superfluous?) getting config from block
Prettify output to SSI includes

Removes unwanted white space and keeps indentation.
Adds experimental standalone exe (done via PAR::Package)

Experiment further too see if this is stable. It would
be a very nice tool to get out releases and will decrease
the download size for the installer. Although this probably
removes the possibility to call perl from a cgi standpoint.
Updates packager scripts
Adds minor fixes for packager scripts