This is the prototype of the system which implement the threading class
to handle the download task.
Add *.pyc to .gitignore and add the settings of pydev project to the git
repository.
This is the new Producer and Consumer Model Style Code for
multi-threading.
function correct. need to improve.
commit some unused import.
Make Bing Map subtask config load from *.cfg file.
Todo:
1.breakpoint resume, save latests (x,y) to *.cfg file
2.If a (x,y,z) tile does not exists, try the (x,y,z-1) tile image and so
on.
3.Write the code to compute the x's range and y's range while given the
longitude and latitude.
Done: 2.If a (x,y,z) tile does not exists, try the (x,y,z-1) tile image
and so on.
Split the different zoom level tile image to its corresponding floder
named by the zool level. e.g 19,20,21
Merge branch 'develop' into temp

Conflicts:
	china.cfg
	handlerThread.py