Added a "webui" profile to package the desktop version of the webui.

- The NSIS stuff is not yet working, but has been copied over from the webui repo to the assembly repo.
fixed executable permissions for webui in assembly
activate webui profile with -DincludeWebUI
typo
Modify pom file and move nsis resources to get the installer gen working
Update documentation and profile name
updated pom to better match the current pom in the master branch
Clean up the assembly merges.

 * check if cfg file generation can be moved to the dev-launcher profile

 * Move NSIS-related resource copying to the `installer` profile
 * Only disable the default `dist-assembly` in the `deb` profile
   (`dev-launcher-assembly` needs not, it's in its own profile)
 * Move the webui unpack to the `webui` profile (merge glitch)
 * Remove the copying of the Braille modules in the `webui` profile
   (this is now handled in the `incl-braille` profile)
 * remove the filtering of deprecated deb-specific scripts in the
   other assemblies.
 * always generate all the config files in the `dev-launcher` profile
 * update the README
Merge pull request #21 from daisy-consortium/desktop-webui

Profile for assembling the Desktop Web UI