Update BUILD_FROM_SOURCE.md
Update BUILD_FROM_SOURCE.md

modify urls to be relative
j-bernardo/lumify,TeamUDS/lumify,RavenB/lumify,lumifyio/lumify,Steimel/lumify,Steimel/lumify,Steimel/lumify,dvdnglnd/lumify,Steimel/lumify,bings/lumify,RavenB/lumify,TeamUDS/lumify,dvdnglnd/lumify,RavenB/lumify,j-bernardo/lumify,Steimel/lumify,lumifyio/lumify,lumifyio/lumify,lumifyio/lumify,TeamUDS/lumify,dvdnglnd/lumify,bings/lumify,j-bernardo/lumify,dvdnglnd/lumify,RavenB/lumify,RavenB/lumify,bings/lumify,lumifyio/lumify,bings/lumify,bings/lumify,TeamUDS/lumify,TeamUDS/lumify,j-bernardo/lumify,j-bernardo/lumify,dvdnglnd/lumify