arcengine 地图的编辑功能

完成了arcengine下对矢量数据的基本编辑功能，

MapEditor
_UpgradeReport_Files
_sgbak
UI
Tool
Task
Properties
obj
MapEditTool
MapEditTask
MapEditCommand
Enum
EditorInterface
EditInterface
Command
bin
Backup
EditorForm.cs
EditorForm.Designer.cs
EditorForm.resx
EditorHelper.cs
EditToolHelper.cs
FrmEditorOption.cs
FrmEditorOption.Designer.cs
FrmEditorOption.resx
FrmMain.cs
FrmMain.Designer.cs
FrmMain.resx
FrmSnappingSet.cs
FrmSnappingSet.Designer.cs
FrmSnappingSet.resx
MapEditor.csproj
MapEditor.csproj.user
MapEditor.csproj.vspscc
MapEditor.sln
MapEditor.suo
MSSCCPRJ.SCC
Program.cs
SketchToolHelper.cs
Test.cs
UpgradeLog.XML
YuLinTu.YuLinPlatform.Common.dll
YuLinTu.YuLinPlatform.Common.xml