document availability on BootstrapCDN; fixes #43
document availability on BootstrapCDN; fixes #43

2947721120/ubiquitous-octo-kumquat,angeliaz/bootlint,evilemon/bootlint,kkirsche/bootlint,techkrish/bootlint,techkrish/bootlint,angeliaz/bootlint,twbs/bootlint,fellipecouto96/bootlint,kkirsche/bootlint,freezy-sk/bootlint,twbs/bootlint,chrismbarr/bootlint,evilemon/bootlint,zacechola/bootlint,evilemon/bootlint,fellipecouto96/bootlint,iamphill/bootlint,chrismbarr/bootlint,techkrish/bootlint,cnbin/bootlint,freezy-sk/bootlint,zacechola/bootlint,angeliaz/bootlint,iamphill/bootlint,2947721120/ubiquitous-octo-kumquat,cnbin/bootlint,chrismbarr/bootlint,cnbin/bootlint,2947721120/ubiquitous-octo-kumquat,kkirsche/bootlint,zacechola/bootlint,freezy-sk/bootlint,iamphill/bootlint,fellipecouto96/bootlint