Markdown fixes in api.md
Markdown fixes in api.md

EIREXE/SpaceDock,ModulousSmash/Modulous,toadicus/KerbalStuff,KerbalStuff/KerbalStuff,toadicus/KerbalStuff,KerbalStuff/KerbalStuff,Kerbas-ad-astra/KerbalStuff,ModulousSmash/Modulous,EIREXE/SpaceDock,ModulousSmash/Modulous,EIREXE/SpaceDock,ModulousSmash/Modulous,Kerbas-ad-astra/KerbalStuff,KerbalStuff/KerbalStuff,Kerbas-ad-astra/KerbalStuff,EIREXE/SpaceDock,toadicus/KerbalStuff