Refactor Stringly Typed Functions to Properly typed functions

[tmspzz]

Refactor all the type Something = String to newtype Something = Something String

Steps which explain the enhancement

1. In Data.Cartfile refactor:

type Location = String
type Version = String

to

newtype Location = Location String
newtype Version = Version String

2. In Data.Romefile refactor:

type FrameworkName = String
type GitRepoName = String

to

newtype FrameworkName = FrameworkName String
newtype GitRepoName  = GitRepoName String

3. Adapt the remaining code to the new types

Current and suggested behavior

Currently some functions are stirngly typed and this leads to quite some confusion around them.
For example in deriveFrameworkNameAndVersion the return type is [(FrameworkName, Version)] which is just an alias for [(String, String)]. This is not optimal as it's possible to mix up FrameworkName with Version later down then code.

If FrameworkName and Version were defined using newtype instead of type mixing FrameworkName and Version would not be possible.

Rome version: v.0.6.1.11
OS and version: MacOSX 10.11.6 - El Capitan

[2016rshah]

I'd be happy to work on this!

[tmspzz]

@2016rshah Please go ahead.

[tmspzz]

@2016rshah Once you are done I can open another issue and if you know QuickCheck you could write some test for the refactored code too.

[tmspzz]

@2016rshah Thanks for your contribution!