Merge pull request #201 from Sue-Yi-FAN/master

modify back-end server to accumulate new data and drop old data
Issue 203 - Remove test case pull-down menu in detail page.
Merge pull request #204 from john29917958/john-patch

Issue 203 - Remove test case pull-down menu in detail page.
Issue 205 - Bug - Remove home page and help button in index.jade.
Merge pull request #206 from john29917958/john-patch

Issue 205 - Bug - Remove home page and help button in index.jade.
Issue 207 - Migrate home page functionality to Travis-reporter title.
Merge pull request #208 from john29917958/john-patch

Issue 207 - Migrate home page functionality to Travis-reporter title.
Issue - 209 - Travis-reporter theme design.
Merge pull request #210 from john29917958/john-patch

Issue - 209 - Travis-reporter theme design.
Issue 213 - Delete mongod.lock under database folder.
Issue - 212 - Delete npm-debug.log under server folder.
Issue 221 - Bug - Delete npm-debug.log under private folder.
Issue 223 - Bug - button.js detailButtonAction error.
Issue 215 - Clear data in databse.
Merge pull request #225 from john29917958/john-database-patch

Issue 215 - Clear data in databse.
Issue 226 - Add database and *.log to .gitignore.
Merge pull request #227 from john29917958/john-patch

Issue 226 - Add database and *.log to .gitignore.
Issue 215 - Clear data in databse.
Merge pull request #228 from john29917958/john-patch

Issue 215 - Clear data in databse.
Issue 171 - Front-end code improvement.