Armodel

1. Support to write the AUTOSAR model to arxml file (Issue 25)
* BswCalledEntity
* BswSchedulableEntity
* BswImplementation
* ServiceSwComponentType
* DataTypeMappingSet
* ModeRequestTypeMap
* PortInterface
* ModeInterface
2. Support ot read the AUTOSAR model to arxml file (Issue 25)
* ServiceSwComponentType
* ModeRequestTypeMap
* PortInterface
* ModeInterface
3. Refactor the Base ARType
* ARFloat
* ARNumerical
* ARLiteral
4. Fix Issue 22 - raise wrong Exception: Invalid ResourceConsumption of Implementation

1. Support to write the AUTOSAR model to arxml file (Issue 17)
* ARPackage
* CompositionSwComponent
* CompuMethod
* DataConstr
* Unit
2. Support to read the AUTOSAR model from arxml file (Issue 17)
* ConstantSpecification
* DataConstr
* Unit

1. List all the SwComponentType (Issue 11)
2. Support to parse the DelegationSwConnector (Issue 12)
3. Correct the class definitions of PPortInCompositionInstanceRef and RPortInCompositionInstanceRef. (Issue 12)

1. Add the SwcImplementation support (Issue 9)
2. Add the integer value for memory section alignment (Issue 9)
3. Remove the required attributes for the Implementation according to the AUTOSAR standard 23R-11. (Issue 9)
4. Change the START-ON-EVENT-REF to optional according to the AUTOSAR standard 23R-11. (Issue 9)
5. Change the HANDLE-OUT-OF-RANGE to optional according to the AUTOSAR standard 23R-11. (Issue 9)
6. Add the SensorActuatorSwComponentType support (Issue 9)
7. Change the CATEGORY of COMPU-METHOD to optional.
8. Change the CAN-BE-INVOKED-CONCURRENTLY to optional.