Add support for creating Windows x64 installer

[Teemu Nätkinniemi]

Not exactly a bug but I decided to add InnoSetup support for x64 Windows builds. Patch attached.

[Teemu Nätkinniemi (tnatkinn)]

Disregard, this one picks binaries from x86 Program Files

[Teemu Nätkinniemi (tnatkinn)]

Here's a revised patch that picks correct binaries from the build directory rather than the install directory. This affects both 32-bit and 64-bit builds.

[Alexander Wolf (alexwolf)]

Why used @CMAKE_BINARY_DIR@ instead @CMAKE_INSTALL_PREFIX@ for \share\stellarium\ folder?

[Teemu Nätkinniemi (tnatkinn)]

This way when creating a new installer it uses binaries from the current build directory rather than the install directory (C:\Program Files (x86)) for 64-bit builds this is absolutely necessary, otherwise the installer might contain 32-bit binaries instead of 64-bit. This is because cmake does not support 64-bit Windows properly.

[Alexander Wolf (alexwolf)]

Diff: http://bazaar.launchpad.net/~stellarium/stellarium/trunk/revision/5357

[Bogdan Marinov (daggerstab)]

I've merged the separate 64-bit version of the Inno Setup template, as it made maintenance more difficult:
http://bazaar.launchpad.net/~stellarium/stellarium/trunk/revision/5441
Could you please test if the new version works correctly?

Please also note that before you run "make install", you are supposed to set CMAKE_INSTALL_PREFIX to some temporary directory. On Windows, it defaults to Program Files, but it's not supposed to work like that. So, before "make install", run CMake with something like:

cmake -DCMAKE_INSTALL_PREFIX=c:\stellarium-temp\

See also this unfinished draft in the Stellarium Wiki for how to do this from Qt Creator:
http://www.stellarium.org/wiki/index.php/User:Daggerstab/Building_Stellarium_on_Windows_with_Qt_Creator

[Alexander Wolf (alexwolf)]

Revision 5441 broke 64-bit buildings but I work under fix it. See LP bug #1027607