shezadkhan137 / required / 156

98%

master: 98%

Pull #20

travis-ci

Add multi variable dependency support

Dependencies which contain multiple variables now work as expected.
Example:

```
Requires(R("x"), R("y") + R("z") == R("x"))

Requires(R("x"), Func(len, R("y")) + Func(len, R("z")) == R("x"))
```

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