added apps module

the apps module contains functions for running specific apps. The apps
are 'installed' as console script within setup.py's entry points

arduino_timetable/apps.py

@@ -0,0 +1,17 @@
+import os
+
+from . import run_application
+
+def check_icon(icon_name):
+    own_path = os.path.abspath(__file__)
+    own_dir = os.path.dirname(own_path)
+    icon_path = os.path.join(own_dir, 'appicons', icon_name)
+    if os.path.isfile(icon_path):
+        return icon_path
+    return None
+
+
+def run_magnetic_trap():
+    arduino_commands = {'open': 'o', 'close': 'c'}
+    icon = check_icon('Household-Mouse-Trap.ico')
+    run_application(arduino_commands, "It's a trap!", icon=icon)

setup.py

@@ -117,4 +117,17 @@ setup(
     #     'test': ['pytest'],
     # },
 
+    # if and what non python files be included?
+    include_package_data=True,
+    package_data={
+        'arduino_timetable': ['appicons/*.ico'],
+    },
+
+    # defining entry points, escpecially console script:
+    entry_points={
+        'console_scripts': [
+            'magnetictrap = arduino_timetable.apps:run_magnetic_trap',
+        ],
+    },
+
 )