Radiation script fails if building name has space in it
Running radiation with a scenario that has building names with spaces in them would throw this error.

```python
Running command `ds_illum "/var/folders/3_/62hm8hld4hl4mjtq27_8gkbr0000gn/T/cea_radiation/projects/chunk_0/chunk_0.hea"`
Traceback (most recent call last):
  File "/Users/reynoldmok/Documents/GitHub/CityEnergyAnalyst/cea/resources/radiation/main.py", line 190, in <module>
    main(cea.config.Configuration())
  File "/Users/reynoldmok/Documents/GitHub/CityEnergyAnalyst/cea/resources/radiation/main.py", line 180, in main
    run_daysim_simulation(cea_daysim, zone_building_names, locator, config.radiation, geometry_staging_location,
  File "/Users/reynoldmok/Documents/GitHub/CityEnergyAnalyst/cea/resources/radiation/main.py", line 91, in run_daysim_simulation
    daysim.isolation_daysim(
  File "/Users/reynoldmok/Documents/GitHub/CityEnergyAnalyst/cea/resources/radiation/daysim.py", line 287, in isolation_daysim
    daysim_project.execute_ds_illum()
  File "/Users/reynoldmok/Documents/GitHub/CityEnergyAnalyst/cea/resources/radiation/radiance.py", line 336, in execute_ds_illum
    CEADaySim.run_cmd(command1, self.daysim_bin_directory, self.daysim_lib_directory)
  File "/Users/reynoldmok/Documents/GitHub/CityEnergyAnalyst/cea/resources/radiation/radiance.py", line 103, in run_cmd
    raise subprocess.CalledProcessError(process.returncode, cmd)
subprocess.CalledProcessError: Command 'ds_illum "/var/folders/3_/62hm8hld4hl4mjtq27_8gkbr0000gn/T/cea_radiation/projects/chunk_0/chunk_0.hea"' returned non-zero exit status 1.
```
diff --git a/cea/resources/radiation/radiance.py b/cea/resources/radiation/radiance.py
index 2defd328d..76aee1168 100644
--- a/cea/resources/radiation/radiance.py
+++ b/cea/resources/radiation/radiance.py
@@ -365,7 +365,8 @@ class RadSurface(object):
     __slots__ = ['name', 'points', 'material']
 
     def __init__(self, name, occ_face, material):
-        self.name = name
+        # Make sure there are no spaces in the name, which could affect Daysim parsing the radiance geometry file
+        self.name = name.replace(" ", "_")
         self.points = points_frm_occface(occ_face)
         self.material = material
 
['cea/resources/radiation/radiance.py']