User Interface - phase 2.
Move dbprint command to general toolbar line.
Rename class.
Rename from YdxfPutGrpCodVal to YdxfPutBuffer.
Rename from YdxfGetGrpCodVal to YdxfGetBuffer.
Rearrange package names.
Fix comment.
Set get thread priority higher.
Remove unused code.
User Interface - phase 1.