added support for lower serial baud rates
added support for lower serial baud rates

added 1200, 2400, 4800

GaloisInc/smaccmpilot-SiK,RFDesign/SiK,joeman155/SiK,nusepo/SiK,phelpsw/SiK,tridge/SiK,davidbuzz/SiK,tridge/DavisSi1000,LorenzMeier/SiK,tridge/SiK,phelpsw/SiK,Serveurperso/SiK,chrissnell/DavisSi1000,RFDesign/SiK,weera00/SiK,GaloisInc/smaccmpilot-SiK,tridge/SiK,tridge/SiK,jschall/SiK,phelpsw/SiK,Serveurperso/SiK,geeksville/SiK,geeksville/SiK,tridge/DavisSi1000,RFDesign/SiK,tomszilagyi/SiK,weera00/SiK,mikeclement/SiK,Dronecode/SiK,weera00/SiK,Serveurperso/SiK,weera00/SiK,tridge/SiK,mikeclement/SiK,LorenzMeier/SiK,weera00/SiK,tomszilagyi/SiK,joeman155/SiK,GaloisInc/smaccmpilot-SiK,davidbuzz/SiK,RFDesign/SiK,geeksville/SiK,nusepo/SiK,geeksville/SiK,mikeclement/SiK,nusepo/SiK,tomszilagyi/SiK,nusepo/SiK,joeman155/SiK,geeksville/SiK,jschall/SiK,tomszilagyi/SiK,mikeclement/SiK,jschall/SiK,davidbuzz/SiK,joeman155/SiK,RFDesign/SiK,GaloisInc/smaccmpilot-SiK,LorenzMeier/SiK,LorenzMeier/SiK,gardners/SiK,tridge/DavisSi1000,chrissnell/DavisSi1000,Dronecode/SiK,phelpsw/SiK,joeman155/SiK,gardners/SiK,gardners/SiK,davidbuzz/SiK,Dronecode/SiK,nusepo/SiK,phelpsw/SiK,Dronecode/SiK,davidbuzz/SiK,jschall/SiK,tomszilagyi/SiK,gardners/SiK,chrissnell/DavisSi1000,tridge/DavisSi1000,chrissnell/DavisSi1000,chrissnell/DavisSi1000,mikeclement/SiK,Serveurperso/SiK