turn test/SharedMemory/test.c into a gtest for CI unit testing in github

remove overly verbose printfs in importers
fix axis in r2d2.urdf

src/Bullet3Serialize/Bullet2FileLoader/b3BulletFile.cpp

@@ -215,7 +215,7 @@ void b3BulletFile::parseData()
 		//		}
 			} else
 			{
-				printf("unknown chunk\n");
+				//printf("unknown chunk\n");
 
 				mLibPointers.insert(dataChunk.oldPtr, (bStructHandle*)dataPtrHead);
 			}
@@ -420,4 +420,4 @@ void	b3BulletFile::addStruct(const	char* structType,void* data, int len, void* o
 
 	mLibPointers.insert(dataChunk.oldPtr, (bStructHandle*)data);
 	m_chunks.push_back(dataChunk);
-}
+}

src/Bullet3Serialize/Bullet2FileLoader/b3File.cpp

@@ -612,7 +612,7 @@ void bFile::preSwap()
 				swap(dataPtrHead, dataChunk,ignoreEndianFlag);
 			} else
 			{
-				printf("unknown chunk\n");
+				//printf("unknown chunk\n");
 			}
 		}