Merge pull request #80 from topcircler/master

support build for prod/test version.
Merge pull request #81 from topcircler/master

update version to 40.
change proxy for test server's url
fixed first-time install issue

1. load the Google CE Client lib asynchronously.
2. add options parameter to geo-location API, set enableHighAccuracy to
false to ask  coarse location only; set timeout to 5000(ms).
remove "anno in anno" feature from create anno screen

remove it for now, will add it back later.
Add log enable switch.
Merge remote-tracking branch 'upstream/master'