✨ Added driver script for simtbx.nanoBragg

xtl.nanobragg.jobs.scripts:nanobragg
- Added high-level interface for configuring and running nanoBragg
  simulations

xtl.nanobragg.jobs.scripts/stol
- Added STOL files for common materials: air, helium, ice, water,
  paratone-n

Author: dtriand

.gitignore

@@ -1,12 +1,12 @@
 ### Development
-playground/
-utils/
-scripts/
-tests/cache
-src/xtl/chemistry
-src/xtl/chemistry2
-src/xtl/crystallization2
-src/xtl/plots
+/playground
+/utils
+/scripts
+/tests/cache
+/src/xtl/chemistry
+/src/xtl/chemistry2
+/src/xtl/crystallization2
+/src/xtl/plots
 
 ### Temporary
 docs_/