Merge branch 'explore' into 'master'

update explore

See merge request codechina/operation-work!1

explore/index.yml

+banner: 
+  - 'http://local-code.csdn.net:3000/assets/about/banner_1-fcc9abe35abd3bf964dbabec547d9c706596839c2ed0ec4eff6a859f7af1c629.jpg'
+trending_words: 
+  - 'ruby on rails'
+  - rails 
+  - ror
+projects: 
+  - 'codechina/explore'
+  - 'pulltheflower/one_sentence1'
+groups: 
+  - 'pmp/tmp'
+  - pmp
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