Make Query Generators Into Dynamic Modlues

Move bingQueriesGenerator to queryGenerators folder
main.py add queryGenerators folder to PATH
Add <queries> tag to config file
Modify config.py to read <queries> tag
Make bingQueriesGenerator dynamic loadable
Currently I see three packages:
1. the top level - where main.py sits
2. one level below - pkg contents
3. one level under pkg - the logic you're introducing