Support data test cases

[StardustDL]

How about use diff to judge program, just like on online judge. ( use judge command )

Maybe add file's unique config, or directory work-item? Like a.c.config or /a/.config

How to organize data is also an important problem.

a/
  data/
    config.json
    input1
    output1
    ...
    judger

[eXceediDeaL]

To improve file support, add these:

• specific config and data
• use new class WorkItem instead of str for currentFile
• new -d --dir command, to create a directory for one work-item.
• new -c --config to create specific file config.
• new -t --test to create test cases, only support for directory item.
  • this will create data directory, and add some config files.
• after that, add judge command

These functions need more time to realize. Maybe in version 0.0.3 or 0.0.4, full realization in 0.0.4, the next alpha version.

[eXceediDeaL]

Now this commit add directory support: 1f84cad0f0a729d72e0cc7eac6067f0a6871fe30.

We will not support multi-tests for now, but you can use directory work-item and write your own judging script.

Attention: this feature is pre-alpha, that means it may have bugs and it is not stable enough.

Code review is planning.