Make sure that reference doc is served static
Make sure that reference doc is served static

Newer versions of the App Engine SDK insist that we declare our
statically served files. We omitted /reference/**. This commit adds it.

Change-Id: I652adae99b7bf3df50ea8b6fb3f201c430d3e002

tatuzaumm/app-inventor2-custom,dengxinyue0420/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,thequixotic/appinventor-sources,kkashi01/appinventor-sources,egiurleo/appinventor-sources,CoderDojoLX/appinventor-sources,kkashi01/appinventor-sources,thequixotic/appinventor-sources,puravidaapps/appinventor-sources,wanddy/appinventor-sources,William-Byrne/appinventor-sources,farxinu/appinventor-sources,Klomi/appinventor-sources,farxinu/appinventor-sources,halatmit/appinventor-sources,afmckinney/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,themadrobot/appinventor-sources,mit-dig/punya,afmckinney/appinventor-sources,kkashi01/appinventor-sources,mit-dig/punya,Klomi/appinventor-sources,josmas/app-inventor,lizlooney/appinventor-sources,puravidaapps/appinventor-sources,lizlooney/appinventor-sources,jisqyv/appinventor-sources,RachaelT/appinventor-sources,mit-cml/appinventor-sources,RachaelT/appinventor-sources,CoderDojoLX/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,jisqyv/appinventor-sources,William-Byrne/appinventor-sources,William-Byrne/appinventor-sources,josmas/app-inventor,mit-cml/appinventor-sources,mintingle/appinventor-sources,barreeeiroo/appinventor-sources,mit-cml/appinventor-sources,warren922/appinventor-sources,ewpatton/appinventor-sources,farxinu/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,ewpatton/appinventor-sources,tatuzaumm/app-inventor2-custom,CoderDojoLX/appinventor-sources,thequixotic/appinventor-sources,marksherman/appinventor-sources,egiurleo/appinventor-sources,dengxinyue0420/appinventor-sources,thequixotic/appinventor-sources,wanddy/appinventor-sources,Klomi/appinventor-sources,josmas/app-inventor,mintingle/appinventor-sources,thequixotic/appinventor-sources,farxinu/appinventor-sources,ewpatton/appinventor-sources,puravidaapps/appinventor-sources,spefley/appinventor-sources,halatmit/appinventor-sources,mintingle/appinventor-sources,mintingle/appinventor-sources,barreeeiroo/appinventor-sources,barreeeiroo/appinventor-sources,mit-cml/appinventor-sources,afmckinney/appinventor-sources,mit-dig/punya,puravidaapps/appinventor-sources,barreeeiroo/appinventor-sources,egiurleo/appinventor-sources,kkashi01/appinventor-sources,lizlooney/appinventor-sources,mintingle/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,mit-cml/appinventor-sources,dengxinyue0420/appinventor-sources,warren922/appinventor-sources,barreeeiroo/appinventor-sources,marksherman/appinventor-sources,spefley/appinventor-sources,themadrobot/appinventor-sources,mit-cml/appinventor-sources,themadrobot/appinventor-sources,ewpatton/appinventor-sources,halatmit/appinventor-sources,warren922/appinventor-sources,wanddy/appinventor-sources,dengxinyue0420/appinventor-sources,josmas/app-inventor,FIRST-Tech-Challenge/appinventor-sources,William-Byrne/appinventor-sources,marksherman/appinventor-sources,jisqyv/appinventor-sources,halatmit/appinventor-sources,tatuzaumm/app-inventor2-custom,RachaelT/appinventor-sources,marksherman/appinventor-sources,egiurleo/appinventor-sources,josmas/app-inventor,warren922/appinventor-sources,afmckinney/appinventor-sources,mintingle/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,mit-dig/punya,CoderDojoLX/appinventor-sources,spefley/appinventor-sources,lizlooney/appinventor-sources,marksherman/appinventor-sources,wanddy/appinventor-sources,halatmit/appinventor-sources,tatuzaumm/app-inventor2-custom,mit-dig/punya,wanddy/appinventor-sources,kkashi01/appinventor-sources,LaboratoryForPlayfulComputation/appinventor-sources,ewpatton/appinventor-sources,jisqyv/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,William-Byrne/appinventor-sources,mit-dig/punya,jisqyv/appinventor-sources,jisqyv/appinventor-sources,warren922/appinventor-sources,spefley/appinventor-sources,farxinu/appinventor-sources,kkashi01/appinventor-sources,halatmit/appinventor-sources,CoderDojoLX/appinventor-sources,tatuzaumm/app-inventor2-custom,themadrobot/appinventor-sources,themadrobot/appinventor-sources,FIRST-Tech-Challenge/appinventor-sources,mit-dig/punya,puravidaapps/appinventor-sources,afmckinney/appinventor-sources,egiurleo/appinventor-sources,marksherman/appinventor-sources,Klomi/appinventor-sources,Klomi/appinventor-sources,spefley/appinventor-sources,RachaelT/appinventor-sources,ewpatton/appinventor-sources,lizlooney/appinventor-sources,dengxinyue0420/appinventor-sources,RachaelT/appinventor-sources,josmas/app-inventor