modify gitignore
modify .gitignore, delete trash
add sqlite3
add 'sqlite3' in Gemfile
ignore unnecessary dir
delete mysql for error
Merge branch 'master' of github.com:bay6/prerequisite

Conflicts:
	.DS_Store
	origin/blog/Gemfile
add perfectfoolish.md
modify wishing_wall
Merge pull request #68 from perfectfoolish/master

I come