modify primer.md to have exactly the same contents as the one in up-to-date master branch
modify primer.md to have exactly the same contents as the one in up-to-date master branch

waans11/incubator-asterixdb,kisskys/incubator-asterixdb,ecarm002/incubator-asterixdb,waans11/incubator-asterixdb,apache/incubator-asterixdb,amoudi87/asterixdb,sjaco002/incubator-asterixdb,ecarm002/incubator-asterixdb,parshimers/incubator-asterixdb,amoudi87/asterixdb,ecarm002/incubator-asterixdb,parshimers/incubator-asterixdb,heriram/incubator-asterixdb,heriram/incubator-asterixdb,kisskys/incubator-asterixdb,ty1er/incubator-asterixdb,ecarm002/incubator-asterixdb,amoudi87/asterixdb,heriram/incubator-asterixdb,apache/incubator-asterixdb,kisskys/incubator-asterixdb,apache/incubator-asterixdb,parshimers/incubator-asterixdb,sjaco002/incubator-asterixdb,ecarm002/incubator-asterixdb,amoudi87/asterixdb,sjaco002/incubator-asterixdb,waans11/incubator-asterixdb,kisskys/incubator-asterixdb,amoudi87/asterixdb,ty1er/incubator-asterixdb,amoudi87/asterixdb,kisskys/incubator-asterixdb,sjaco002/incubator-asterixdb,apache/incubator-asterixdb,waans11/incubator-asterixdb,sjaco002/incubator-asterixdb,kisskys/incubator-asterixdb,ecarm002/incubator-asterixdb,waans11/incubator-asterixdb,heriram/incubator-asterixdb,apache/incubator-asterixdb,waans11/incubator-asterixdb,parshimers/incubator-asterixdb,ecarm002/incubator-asterixdb,ty1er/incubator-asterixdb,heriram/incubator-asterixdb,kisskys/incubator-asterixdb,heriram/incubator-asterixdb,waans11/incubator-asterixdb,apache/incubator-asterixdb,heriram/incubator-asterixdb,ty1er/incubator-asterixdb,parshimers/incubator-asterixdb,apache/incubator-asterixdb,ty1er/incubator-asterixdb,parshimers/incubator-asterixdb,sjaco002/incubator-asterixdb,ty1er/incubator-asterixdb