Fix liner dependency for baduk bin

See merge request !34

TODO change Cargo.toml to use liner from crates.io repository after it
has been updated, since current version of liner in crates.io fails to
compile (0.4.4).

Update game Reblox: Change block generation, add capability to "hold"

See merge request !32

Blocks now are randomly picked from a pool that is reset when pool is
empty instead of randomly picking from all possible blocks each time.

Can now hold the currently falling block to use later.

Bug fix: Resetting a game with "lines cleared" > 10 would result in
invalid score display.

Minesweeper: Prevent first-turn fail, and other improvements

See merge request !30

This commit makes sure that the player cannot hit a mine on the first
click.

These improvements include:
    - Making flag and mine characters more descriptive
    - Making the background of the mine that lost you the game red.
    - Changing flagging behaviour:
        - The f and F keys are now combined into one; f now toggles flag status.
        - Fixed bug where one could flag cells that had already been revealed.

immediate should be intermediate

Add game redoku (Sudoku)

Previously, the game was created with raw stdout terminal when using the
"-s <seed>" arguments. Since it is now using Game::new_no_raw(), the
exit block is no longer necessary.

reblox: Use AnsiValue for block colors

It makes the game look better on terminals with custom color schemes

New food

[WARNING] Big RUSThello update

Big update. Many small fixes, but mainly dependencies are changed: now
use `reversi`, `rand` and `rayon`. Also, I bumped `termion` version!