Added tests for brewer being created from JSON

Also added a base class for simple tests.

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Added brewer class (including convertion form JSON)

Also added some converters in a new object to implicitly manage some of
the common changes used in the JSOn conversions.

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Added tests for drink generation from JSON and test beer data.

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Corrected `source` and `target` properties in build 

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Refactored Drink extraction from JSON to pass tests

This has also made it clearer by using the same format as the `Brewer`
class.

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Removed unused spec test file.
Removed price and remaining status from Drink.

These are provided in the Festival data.

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Added test and implementation for basic Festival Data loading.

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Reverted build back to version 0.6.2 of `android-sbt-plugin`
Added test data for loading of drinks & brewers databases  

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Added basic test for loading of the drinks and brewers into the db

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Changed basic db load tests to use a direct db instance.

The access model is going to be using a single instance via an access
class as this allows me to change the location of the underlying db in
the future.

Also extracted the common test data to allow it to be used with the db
access tests.

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Created basic test for initialisation of the  in memory database access.

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Created basic classes & traits to support an in memory database for
brewers and drinks.

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Renamed camra db classes to reflect that they are in memory
implementations.

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Added test stubs for main discrete search functions.

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Added tests for search of drinks by name.

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Implemented drink name contains search.

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Added drinkNameContains method to db access trait

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Added tests for basic functionality of the Festival Model

This essentially needs to be able to determine a list of all the drinks
and brewers that are present at the festival. 

re: #1