Update README: gilt => mbryzek
Update README: gilt => mbryzek

haveal/schema-evolution-manager,mbryzek/schema-evolution-manager,evadnoob/schema-evolution-manager,mbryzek/schema-evolution-manager,agilemobiledev/schema-evolution-manager,jonathang/schema-evolution-manager,Seanstoppable/schema-evolution-manager,keithlayne/schema-evolution-manager