* Update docs/submodules/qtip from branch 'master'
- Merge "Add more content to developer overview"
- Add more content to developer overview
- copy "Coding Style" from `CONTRIBUTING.md`
- copy "Testing" from `DEVELOP.md`
- add links of primary packages
Change-Id: Ia4da2c610a3ceb41ec710904e9437b0449d0a46f
Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>
-Subproject commit 187b7b7843d4d5071311abd3c001df91b6f469be
+Subproject commit 14e9c620366b46481aef204edcf892bbaa4ef6be