Devajit Asem

This PR automatically reads tickers from conf file if there is any.

Fixes #36

Relevant code: https://github.com/dragfire/leetup/blob/master/src/service/leetcode.rs#L765 https://github.com/dragfire/leetup/blob/master/src/service/provider.rs#L97-L121

Fixes: #13

This will help in creating Vim plugin -- use Vim's `channel` to communicate with `leetup` server. Use https://github.com/rusqlite/rusqlite and remove KvStore.

Test: ``` list List questions pick Pick a problem submit Submit a problem test Submit a problem user User auth ```

Leetup doesn't show anything when picking a locked question. Reproduce issue: `leetup pick 1645` Relevant code: https://github.com/dragfire/leetup/blob/master/src/service/leetcode.rs#L749-L781

Unicode icon does not render properly in Windows

2

 Unicode icons: https://github.com/dragfire/leetup/blob/master/src/icon.rs Some ideas: https://github.com/leetcode-tools/leetcode-cli/blob/master/icons/ascii.json https://github.com/leetcode-tools/leetcode-cli/blob/master/icons/win7.json Will need to have a fallback for command prompt!

Do everything inside Vim/Neovim: Navigation, Exploring problems, Solve, Test, Submit.

Relevant code here: https://github.com/dragfire/leetup/blob/master/src/service/auth.rs#L58