Added default values to migration

by copying the child elements of the old node, modifying the port index
when needed, and creating new nodes when constant default values are not
applicable.
Added default values to node implementations

- Color.ByARGB
- Solid.Cylinder
- Solid.Sphere
- Solid.Torus
- Solid.BoxByTwoCorners
- Solid.BoxByCenterAndDimensions
- Form.ByLofting
- Excel.WriteDataToExcelWorksheet
append asVector node
Added more default values to migration
Cleanup
append Point.AsVector node during migration
Migration for FamilyInstanceParameterSelector & FamilyInstanceParameterGetter

- Implements FamilyInstanceParameters class to get the dropdown for all
the family instance as well as type parameters.
- Provide migration logic for FamilyInstanceParameterSelector &
FamilyInstanceParameterGetter
- Fixes http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-2638
- Fixes http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-2660
- Fixes http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-2334
append asVector node
Migration Code cleanup

- Removed method CloneAndChangeType to use CloneAndChangeName
- All the instances of CloneAndChangeType is changed to use
CloneAndChangeName and use the new node name as nick name, so that users
know which node is migrated as what.
More migration stuff done

- Migrates FamilyTypeParameterGetter  to same as
FamilyInstanceParameterGetter
- Fixes http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-2663
- Migrates GetFamilyInstancesByType  to same as AllElementsOfType
- Fixes http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-2664
- Migrates OverrideColorInView to Element.OverrideColorInView and also
swaps the input port connections, because in 0.6.3 color was first input
and element was second, now it's opposite.
- Fixes http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-3031
Merge pull request #1550 from sharadkjaiswal/Phantom

Migration for FamilyInstanceParameterSelector & FamilyInstanceParameterG...
Add Revit unit test helper methods

partially based on the methods in DSEvaluationUnitTest base class.
Add assertions to Sample file test cases

- 01 Create Point
- 02 Ref Grid Sliders
Added user profile links to each in contributor list
Merge pull request #1555 from Benglin/master

Added user profile links to each in contributor list
Merge pull request #1554 from ellensi/SampleTests

Sample file test cases
Merge pull request #1551 from ellensi/MigrationDefaultValues2

Migrating default values
Merge pull request #1548 from Zhengzi/Maple

append Point.AsVector node during migration
Addressed review feedback of pull request 1544
Merge pull request #1556 from Benglin/master

Addressed review feedback of pull request 1544