fix upcase
Restructured.
Merge branch 'feature/newdocs' of github.com:icattlecoder/docs.qiniu.com into feature_1
Added pfop and style.
add tech articles
fix
Merge branch 'feature/newdocs' of github.com:icattlecoder/docs.qiniu.com into feature_1
techArctiles->kb
Merge branch 'feature/newdocs' of github.com:icattlecoder/docs.qiniu.com into feature_1
Changed from images to img.
Refactored the management of pics.
Organized tutorials.
Use case.
First review of API guides.
FOP APIs.
PFOP apis.
Categorized image and av apis.
Merge branch 'feature_1' of https://github.com/hughlv/docs.qiniu.com into feature_1

Conflicts:
	_data/apiref.json
	_data/apiview.json
	api/overview/dn/advanced-download.markdown
	api/overview/dn/download.markdown
	api/overview/dn/security.markdown
	api/overview/fop/builtin-fop.markdown
	api/overview/fop/persistent-fop.markdown
	api/overview/images/programming-model.png
	api/overview/images/programming-model.pptx
	api/overview/programming-model.markdown
	api/overview/rs/rs.markdown
	api/reference/fop/image/index.markdown
	api/reference/fop/preset-fops.markdown
	api/reference/fop/saveas.markdown
	docstyles/drawing-tools.markdown
	guide/index.markdown