Fix WordCount Example code
fix #245, remove jacoco due to exception
allow user specify log dir in gear.conf
Merge pull request #246 from whjiang/logging

#225 allow user specify log dir in gear.conf
fix #233 add timeout for interactive messages
Merge pull request #247 from huafengw/timeout

fix #233 Add timeout for interactive messages
 Create readme for external folder
part of #215 Add API resolveAppId
Merge pull request #248 from huafengw/refineAPI

part of #215 Add API resolveAppId