chore(travis): change travis config to use ubuntu precise (#2285)
chore(travis): change travis config to use ubuntu precise (#2285)


valor-software/ng2-bootstrap,Le0Michine/ng2-bootstrap,valor-software/ngx-bootstrap,valor-software/ng2-bootstrap,valor-software/ngx-bootstrap,Le0Michine/ng2-bootstrap,valor-software/ngx-bootstrap,valor-software/ngx-bootstrap