Package icons and dependencies for Linux

* Added icons and desktop shortcuts for Linux
* Added lines for dependencies (may be modified by the packager) for DEB and
RPM packages
Added Inno Setup packaging method

* Retrieved ModifyPath.iss from Mozart 1 repo and updated it
* Added Inno Setup scripts with batch file to check Tcl version
* Modified CMakeLists to compute Inno Setup configuration
* Added make installer target on Windows to launch the process
* Updated Windows README to include setup making notice