Fix gem version
Add bunble install and the Gemfile usage.
Fix gem ep2
Fix gem ep3
delete Gemfile usage
we will not deploy sqlite3
we will not deploy sqlite3
Merge pull request #40 from yuchan/yo-add-category-selection

add category selection.
Merge pull request #42 from not001praween001/master

Fix gem version
Merge pull request #43 from not001praween001/master

Fix gem travis err ep2-3.