Rewrite FDEngineAdapter

<b>In QuantLib/C++, FDEngineAdapter is defined as</b>

<pre>
    template <typename base, typename engine>
    class FDEngineAdapter : public base, public engine { ... }
</pre>

<b>where</b>
    * base ultimately extends FDVanillaEngine::engine
    * engine ultimately extends OneAssetOption::engine

<b>and employed as examples below:</b>

<pre>
typedef FDEngineAdapter
    <FDShoutCondition<FDStepConditionEngine>, VanillaOption::engine>
FDShoutEngine;

typedef FDEngineAdapter
    <FDAmericanCondition<FDStepConditionEngine>, OneAssetOption::engine>
FDAmericanEngine;

typedef FDEngineAdapter
    <FDDividendEngine, DividendVanillaOption::engine>
FDDividendEuropeanEngine;

typedef FDEngineAdapter
    <FDDividendEngineMerton73, DividendVanillaOption::engine>
FDDividendEuropeanEngineMerton73;

typedef FDEngineAdapter
    <FDDividendEngineShiftScale, DividendVanillaOption::engine>
FDDividendEuropeanEngineShiftScale;
</pre>

<b>Note:</b>
 * Template parameter "base" maybe a simple class or a parameterized class.

<b>Translating to Java</b>
When we translate to Java, we should <i>probably</i> translate like this:

<pre>
public class FDEngineAdapter
    <Base extends FDVanillaEngine, Engine extends OneAssetOption.Engine>
    implements OneAssetOption.Engine { ... }
</pre>

and inside our implementation of FDEngineAdapter we should be able to accept Base as both a simple class and also a parameterized class.

Suggestion: Employ TypeTokenTree to help sort our generic parameters.

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Relationships
=============
duplicate of http://bugs.launchpad.net/bugs/jquantlib-229
related to http://bugs.launchpad.net/bugs/jquantlib-425
child of http://bugs.launchpad.net/bugs/jquantlib-394