fix camel case in default settings filenames

... closes #169

Author: agurvich

src/firefly/data_reader/settings.py

@@ -635,15 +635,15 @@ def find_closest_string(string,string_list):
 default_app_settings = load_from_json(
     os.path.abspath(os.path.join(
         os.path.dirname(__file__),
-        '../static/js/misc/DefaultSettings.json')))
+        '../static/js/misc/defaultSettings.json')))
 default_particle_settings = load_from_json(
     os.path.abspath(os.path.join(
         os.path.dirname(__file__),
-        '../static/js/misc/DefaultParticleSettings.json')))
+        '../static/js/misc/defaultParticleSettings.json')))
 default_settings = {**default_app_settings,**default_particle_settings}
 
 
 colormaps = load_from_json(
     os.path.abspath(os.path.join(
         os.path.dirname(__file__),
-        '../static/textures/colormap_names.json')))['names']
+        '../static/textures/colormap_names.json')))['names']