SWMM simulations don't work when running as x64

[jamaa]

Since v1.9.2, BlueM.Opt is only released as a x64 version. When running as x64, SWMM simulations fail with the message

There was an error during dll loading : [...]\SWMM\temp\SWMM501.dll, error - 193

This is most likely due to the fact that the native SWMM5.dll currently included in BlueM.Opt was compiled for x86.

To fix:

• Replace SWMM5.dll with a x64 version, probably from here: https://www.epa.gov/water-research/storm-water-management-model-swmm
• Check whether updating SWMM from v5.0.018 (the currently included version) to a newer version (latest available version is currently v5.2.2) also requires modifications to SWMM.DLLAdapter
• Replace IHWB.SWMM.DllAdapter.dll with a newly compiled x64 version of SWMM.DLLAdapter (note the filename and namespace changes, which will also require some changes to BlueM.Opt code)

[jamaa]

Actually, SWMM.DLLAdapter already seems incompatible with SWMM v5.1.0.15 (see #1), so there will definitely be work involved to update to v5.2.

Unless someone steps in to work on this, I guess we will just have to remove SWMM from BlueM.Opt.