added urdf and meshes for the sia20d
Fixed package name case in SIA20D
Search and replace of package name (corrected case) in all files
renamed files with correct case
more case fixes (missed in last commit)
Revert "added urdf and meshes for the sia20d"

This reverts commit 07452500e945b154dbfa60fa43b785c2fab3b5d0.
Merge pull request #15 from ros-industrial/issue4_sia20_rename

Issue4 sia20 rename
Updated readme to standard format.