add unicoron Gem
create Procfile for heroku-unicorn
modify Gemfile.lock for modifying Gemfile
add unicong setting file
solve conflict between #15 and #16
update Gemfile.lock for resolving Gemfile conflict
remove sqlite gem
update Gemfile.lock
Merge pull request #18 from yochiyochirb/add-unicorn-settings

add unicoron settings