Little changes to recover crash.
Add .travis.yml.
Travis ci learning.
Move the test files out from test folder.
Add travis ci build status image.
Add a very simple db helper.

1. add Table and PagedTable struct for simply db operations.
2. little changes to travis ci configuration file.
3. add some test files.
Fix a bug caused by nil object.

1. fix db.Table.Args' nil issue.
2. delete db/example.db.
Don't serve default static dir if not exists.

1. cancel to serve default static dir if it does not exist.
2. rename constants.
Forget to change rename constants in test file.
Rename a function.
Merge pull request #5 from ggicci/dev

Dev