add afnetwork library and DRO include
add demo method
add comment link
add download view controller
update download manager, now support download and delegate
Merge branch 'feature/afnetworkingstart' of github.com:lanvige/apollo into feature/afnetworkingstart

Conflicts:
	Apollo/AFDownloadDemo.m
fix manager invoke issue
add download manager
download queue
new download context
Merge branch 'feature/afnetworkingstart' into develop
add pod and config test project
add ghunit framework in project
fix libpod ref issue
add first test case
Merge branch 'feature/addunittest' into develop
add system config and coreservice fx
add download config to store total size
new table demo page
add downloadTablecell