Misc changes from change to a scripted importer

MaterialGraphProject/Assets/New Shader Graph.ShaderGraph.meta

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MaterialGraphProject/Assets/PartyPreview.ShaderGraph.meta

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MaterialGraphProject/Assets/SphereDent.ShaderGraph.meta

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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Add.ShaderGraph.meta

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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/AddSubGraph.ShaderGraph.meta

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+ScriptedImporter:
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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Cracks.ShaderGraph.meta

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+ScriptedImporter:
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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Gradient.ShaderGraph.meta

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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Multiply.ShaderGraph.meta

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+ScriptedImporter:
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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/SplitCombine.ShaderGraph.meta

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+ScriptedImporter:
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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/TextureSample.ShaderGraph.meta

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+ScriptedImporter:
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MaterialGraphProject/ProjectSettings/ProjectVersion.txt

-m_EditorVersion: 2018.1.0a4
+m_EditorVersion: 2018.1.0a5