Update README.mdpp
Update README.mdpp

Fixed some typos, shortened some long or over-complex sentences, moved information between sections and removed some that I think don't belong in a glossary, or at least not under the current section. Added a proper ending to a clipped sentence.

Also changed "edge documents" to "edges" because if edges are documents isn't "edge documents" redundant?

fceller/arangodb,graetzer/arangodb,thurt/arangodb,m0ppers/arangodb,kangkot/arangodb,Simran-B/arangodb,graetzer/arangodb,CoDEmanX/ArangoDB,joerg84/arangodb,kangkot/arangodb,baslr/ArangoDB,joerg84/arangodb,baslr/ArangoDB,kangkot/arangodb,kangkot/arangodb,jsteemann/arangodb,fceller/arangodb,joerg84/arangodb,joerg84/arangodb,baslr/ArangoDB,graetzer/arangodb,arangodb/arangodb,hkernbach/arangodb,m0ppers/arangodb,CoDEmanX/ArangoDB,CoDEmanX/ArangoDB,CoDEmanX/ArangoDB,hkernbach/arangodb,jsteemann/arangodb,Simran-B/arangodb,graetzer/arangodb,fceller/arangodb,CoDEmanX/ArangoDB,thurt/arangodb,fceller/arangodb,Simran-B/arangodb,graetzer/arangodb,fceller/arangodb,baslr/ArangoDB,graetzer/arangodb,m0ppers/arangodb,joerg84/arangodb,hkernbach/arangodb,m0ppers/arangodb,baslr/ArangoDB,CoDEmanX/ArangoDB,baslr/ArangoDB,joerg84/arangodb,baslr/ArangoDB,fceller/arangodb,baslr/ArangoDB,hkernbach/arangodb,wiltonlazary/arangodb,m0ppers/arangodb,thurt/arangodb,arangodb/arangodb,hkernbach/arangodb,wiltonlazary/arangodb,graetzer/arangodb,arangodb/arangodb,thurt/arangodb,wiltonlazary/arangodb,graetzer/arangodb,m0ppers/arangodb,jsteemann/arangodb,hkernbach/arangodb,thurt/arangodb,Simran-B/arangodb,Simran-B/arangodb,wiltonlazary/arangodb,thurt/arangodb,joerg84/arangodb,jsteemann/arangodb,fceller/arangodb,wiltonlazary/arangodb,kangkot/arangodb,wiltonlazary/arangodb,baslr/ArangoDB,graetzer/arangodb,fceller/arangodb,hkernbach/arangodb,jsteemann/arangodb,joerg84/arangodb,graetzer/arangodb,kangkot/arangodb,kangkot/arangodb,Simran-B/arangodb,arangodb/arangodb,Simran-B/arangodb,jsteemann/arangodb,baslr/ArangoDB,fceller/arangodb,m0ppers/arangodb,m0ppers/arangodb,arangodb/arangodb,CoDEmanX/ArangoDB,kangkot/arangodb,baslr/ArangoDB,m0ppers/arangodb,graetzer/arangodb,wiltonlazary/arangodb,wiltonlazary/arangodb,hkernbach/arangodb,m0ppers/arangodb,hkernbach/arangodb,joerg84/arangodb,jsteemann/arangodb,graetzer/arangodb,fceller/arangodb,Simran-B/arangodb,hkernbach/arangodb,jsteemann/arangodb,hkernbach/arangodb,joerg84/arangodb,joerg84/arangodb,thurt/arangodb,CoDEmanX/ArangoDB,joerg84/arangodb,arangodb/arangodb,joerg84/arangodb,jsteemann/arangodb,m0ppers/arangodb,thurt/arangodb,thurt/arangodb,m0ppers/arangodb,graetzer/arangodb,arangodb/arangodb,CoDEmanX/ArangoDB,CoDEmanX/ArangoDB,baslr/ArangoDB,hkernbach/arangodb,Simran-B/arangodb,graetzer/arangodb,thurt/arangodb,m0ppers/arangodb,arangodb/arangodb,hkernbach/arangodb,Simran-B/arangodb,baslr/ArangoDB,kangkot/arangodb,baslr/ArangoDB,jsteemann/arangodb,joerg84/arangodb,hkernbach/arangodb,kangkot/arangodb