Enabled native x64 compilation on Windows

* Updated CMakeLists to support x64 compilation on Windows
* Updated platform detection function call to allow 64bit Windows to be recognized
Added icon for Mozart launcher on Windows

Just to give the shortcuts a better look...
Added launcher and icons for Linux
Improved package generator config

Added lines for dependencies (may be modified by the packager) for DEB and
RPM packages
Added InnoSetup files

* Retrieved ModifyPath.iss from Mozart 1 repo and updated it
* Added main Inno Setup script with batch file to check Tcl version
Updated Windows README
Enabled launch of tests on Windows
Reduced max memory usage on 32-bit Windows
Fixed various typos and InnoSetup helper functions

* Fixed typos and ensured there's an EOL at end of files
* Removed Win9x functions in Inno Setup files as this is not supported
anymore
* Improved code quality of Inno Setup files
Integrated Inno Setup process with CMake

* Added separated iss file for configuration
* Inno Setup configuration is now computed at CMake time
* Added make installer target on Windows to launch the process
* Updated Windows README to include setup making notice