further cleanup to remove hlint errors

Other that adding `--ignore=Parse error` flag as we have discussed, I've also added another flag `--ignore=Reduce duplication` which supresses a lot of Hlint errors which come due to various duplication of code. For example:

In file:
````
raaz-cipher/Raaz/Cipher/AES/Block/Internal.hs
````

`encrypt128` and `encrypt192` functions have some code in common which is required for readability.