build: Tweak travis script.
build: Tweak travis script.

* make travis-runner executable
* only run the runner on direct commits into master

proplanr/polymer-starter-kit,Serious-Rage/poligomy,Ex-ante-Labs/pivot-ahead,Negashev/negash.ru,LM450N/polymer-starter-kit,plusCubed/pluscubed-site,felixzapata/polymer-starter-kit,markovuksanovic/polymer-starter-kit,SB-Technology-Holdings-International/WateringWebClient,andrefuller/PolymerTrailerViewer,semafloor/semafloor-test-alpha,gick/mobile-polymer-starter-2,FaellCarvalho/Geo-Location,SB-Technology-Holdings-International/WateringWebClient,StartPolymer/polymer-starter-kit,JnJSW/dttdata,RoyKoh/Project-3,gertcuykens/polymer-starter-kit,RoyKoh/Project-3,mtusk/polymer-starter-kit,stefanoantonel/ecofit,gertcuykens/polymer-starter-kit,gianluka79/First,LM450N/polymer-starter-kit,markovuksanovic/polymer-starter-kit,Ex-ante-Labs/shopper.ninja,Ex-ante-Labs/shopper.ninja,grebett/polymer-starter-kit,flaiker/polymer-starter-kit,lordoftheflies/mlm-portal,abdonrd/polymer-starter-kit,StartPolymer/polymer-starter-kit-plus,andrefuller/PolymerTrailerViewer,SB-Technology-Holdings-International/WateringWebClient,lordoftheflies/mlm-portal,StartPolymer/polymer-starter-kit-plus,victorgb6/id-questionary,SB-Technology-Holdings-International/WateringWebClient,semafloor/semafloor-test-alpha,victorgb6/id-questionary,FaellCarvalho/Geo-Location,proplanr/polymer-starter-kit,abdonrd/polymer-starter-kit,stefanoantonel/brainpower,stefanoantonel/ecofit,anthonybrown/polymer-starter-kit,stephenzsy/charon-frontend,StartPolymer/polymer-starter-kit,felixzapata/polymer-starter-kit,SB-Technology-Holdings-International/Water,gick/reveries-project,gick/reveries-project,anthonybrown/polymer-starter-kit,Sykkro/penny-web,lordoftheflies/mlm-portal,felixzapata/polymer-starter-kit,FaellCarvalho/Geo-Location,stephenzsy/charon-frontend,gick/reveries-project,trendystore/store,markovuksanovic/polymer-starter-kit,alexpaluzzi/polymer-starter-kit,Ex-ante-Labs/pivot-ahead,Negashev/negash.ru,gianluka79/First,michaetto/f16,Sykkro/penny-web,andrefuller/PolymerTrailerViewer,Sykkro/penny-web,JnJSW/dttdata,michaetto/f16,SB-Technology-Holdings-International/Water,klarkc/polymer-loopback-starter-kit,gertcuykens/polymer-starter-kit,klarkc/polymer-loopback-starter-kit,victorgb6/id-questionary,klarkc/polymer-loopback-starter-kit,flaiker/polymer-starter-kit,Negashev/negash.ru,Serious-Rage/poligomy,semafloor/semafloor-test-alpha,mtusk/polymer-starter-kit,SB-Technology-Holdings-International/Water,michaetto/f16,ragingwind/polymer-starter-kit,ragingwind/polymer-starter-kit,trendystore/store,gick/mobile-polymer-starter-2,proplanr/polymer-starter-kit,SB-Technology-Holdings-International/Water,alexpaluzzi/polymer-starter-kit,stephenzsy/charon-frontend,JnJSW/dttdata,grebett/polymer-starter-kit,grebett/polymer-starter-kit,gick/mobile-polymer-starter-2,RoyKoh/Project-3,trendystore/store,stefanoantonel/brainpower,plusCubed/pluscubed-site,SB-Technology-Holdings-International/Water,alexpaluzzi/polymer-starter-kit,ragingwind/polymer-starter-kit,gianluka79/First,Serious-Rage/poligomy,stefanoantonel/ecofit,LM450N/polymer-starter-kit