flask: Added DEFAULT_CONF_PATH variable
config: Moved config out of the skylines package

We need to be able to use the config package before accessing the skylines
package and by that initializing the Flask instance
config: Added testing config
config: Fixed config paths
config: Make sure use_testing() is not detected as a unit test by nose
websetup: Converted to flask
tests: Converted __init__.py to flask
config/testing: Enabled SQLAlchemy output
tests: Remove db.session before dropping tables
tests: Converted test_tracking_server module to flask
tests/lib: Converted test_sql module to flask
flask: Added created_by_nose property

Since the use_testing() function approach did not work we now examine the
stacktrace to find out if the Flask instance was created by a unit test
and if so we load the appropriate testing config.