Help wanted: Implement using ~/.todos.json by default

[gammons]

Per the comments of multiple users, I think we should implement this workflow:

1. when running todolist, see if a .todos.json exists in the current working directory.
2. If yes, use that .todos.json.
3. If no, use ~/.todos.json.

Also, add documentation to the gh-pages branch to let users know this is how the app works.

PRs welcome!

[waldyrious]

For reference, there's been some related code and discussion in #13.

[NonerKao]

I post a PR first and need your feedback. If it is OK then I'll make the gh-pages part later.

[gammons]

@NonerKao please update gh-pages when you get a chance.

[NonerKao]

#41 I'm sorry for the serious mistake that should have been taken care of.

I follow your suggestion and do some local test, but it fails many tests. The reason is that, if the location check is made in f.Load(), it will overwrite the f.FileLocation in those tests, which is mostly called todos.json rather than .todos.json, with home repository.

Although the value of f.FileLocation is given when NewFileStore is called, it is not referenced until any a.Load. So I propose commit #42 to fix this without changing all those tests, which containes:

• in NewFileStore(): set FileLocation default to ""
• new private function getLocation(): the main logic, those that were in NewFileStore()
• in Load(): call getLocation() to assign a value to f.FileLocation
• in Initialize(): check ".todos.json" instead of f.FileLocation

I apologize again for all the inconvenience.

[gammons]

I'll be getting to this today.

[gammons]

Merged #42 and I am releasing 0.5.2 now.