gitignore: added build/ and *.lock
gitignore: added build/ and *.lock

Silverwolf90/vexflow,mwicat/vexflow,trinketapp/vexflow,johndpope/vexflow,burnnat/vexflow,vmoll/vexflow,zhhz/vexflow,dhruvrajan/vexflow,aaronmars/scottish-writer,cute/vexflow-musicxml,fgeorgy/vexflow,alexmao86/vexflow,springzh/vexflow,avorio/vexflow,jbernie2/vexflow,zex713/vexflow,Kosar79/vexflow,Mdonmounts/vexflow,lasconic/vexflow-musicxml,RSid/vexflow,zachledoux/vexflow,dfcreative/vexflow,RSid/vexflow,Silverwolf90/vexflow,natedsaint/vexflow,rukor/vexflow,aaronmars/vexflow,fgeorgy/vexflow,Kosar79/vexflow,IcculusC/vexflow,jmahmud/vexflow,nybbs2003/vexflow,JasonLil/vexflow,aerhard/vexflow,dhruvrajan/vexflow,IcculusC/vexflow,trinketapp/vexflow,niklasgrahl/vexflow,vmoll/vexflow,Mdonmounts/vexflow,FatPanther/vexflow,cdosborn/vexflow,JasonLil/vexflow,cdosborn/vexflow,dhruvrajan/vexflow,wander2001/vexflow,ecompositor/vexflow,springzh/vexflow,amitgur/vexflow,ecompositor/vexflow,gaborveszpremi/vexflow,clecap/vexflow-musicxml,Petezah/vexflow,Fabrico/vexflow,Daremyth/vexflow,toni07/vexflow,Daremyth/vexflow,Tails/vexflow,avorio/vexflow,aaronmars/vexflow,zachledoux/vexflow,Petezah/vexflow,aaronmars/scottish-writer,rukor/vexflow,toni07/vexflow,DigitalCoder/vexflow,FatPanther/vexflow,jcrogel/vexflow,cute/vexflow-musicxml,cpill0789/vexflow,niklasgrahl/vexflow,JanvanCasteren/vexflow,vikeen/vexflow,toni07/vexflow,bwbohl/vexflow,cpill0789/vexflow,Tails/vexflow,Petezah/vexflow,jcrogel/vexflow,aaronmars/vexflow,Mdonmounts/vexflow,FatPanther/vexflow,aaronmars/scottish-writer,toni07/vexflow,spencerhitch/vexflow_extended,ssoRL/vexflow,bwbohl/vexflow,cdosborn/vexflow,LarryKu/vexflow,Silverwolf90/vexflow,zex713/vexflow,gaborveszpremi/vexflow,bsouthward/vexflow,Daremyth/vexflow,Huji/vexflow,aerhard/vexflow,Fabrico/vexflow,wander2001/vexflow,Chipairon/vexflow,Huji/vexflow,JasonLil/vexflow,liuyang1204/vexflow,liuyang1204/vexflow,trinketapp/vexflow,cute/vexflow-musicxml,mcanthony/vexflow,fgeorgy/vexflow,shuanzi/vexflow,voidest1/vexflow,amitgur/vexflow,JanvanCasteren/vexflow,clecap/vexflow-musicxml,vmoll/vexflow,alexmao86/vexflow,mariushe/vexflow,Charlie-Wellesley/vexflow,niklasgrahl/vexflow,mariushe/vexflow,aerhard/vexflow,bwbohl/vexflow,Charlie-Wellesley/vexflow,DigitalCoder/vexflow,ecompositor/vexflow,lasconic/vexflow-musicxml,clecap/vexflow-musicxml,Huji/vexflow,johndpope/vexflow,Kosar79/vexflow,natedsaint/vexflow,jcrogel/vexflow,spencerhitch/vexflow_extended,nybbs2003/vexflow,jmahmud/vexflow,spencerhitch/vexflow_extended,wander2001/vexflow,cute/vexflow-musicxml,ssoRL/vexflow,redreamality/vexflow,jmahmud/vexflow,JanvanCasteren/vexflow,LarryKu/vexflow,pinxue/vexflow,DigitalCoder/vexflow,Chipairon/vexflow,winning1120xx/vexflow,dfcreative/vexflow,dfcreative/vexflow,springzh/vexflow,zex713/vexflow,LarryKu/vexflow,winning1120xx/vexflow,liuyang1204/vexflow,redreamality/vexflow,ssoRL/vexflow,amitgur/vexflow,rukor/vexflow,cpill0789/vexflow,mcanthony/vexflow,alexmao86/vexflow,Chipairon/vexflow,Fabrico/vexflow,Charlie-Wellesley/vexflow,pinxue/vexflow,vikeen/vexflow,zhhz/vexflow,redreamality/vexflow,mwicat/vexflow,voidest1/vexflow,lasconic/vexflow-musicxml,pinxue/vexflow,ringw/vexflow,Tails/vexflow,clecap/vexflow-musicxml,mcanthony/vexflow,gaborveszpremi/vexflow,winning1120xx/vexflow,voidest1/vexflow,burnnat/vexflow,burnnat/vexflow,shuanzi/vexflow,bsouthward/vexflow,mwicat/vexflow,natedsaint/vexflow,bsouthward/vexflow,nybbs2003/vexflow,IcculusC/vexflow,jbernie2/vexflow,avorio/vexflow