Branch for doing the upgrade to the Calendar V3 API from Google.

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/branches/upgrade_to_v3@1028743 b8457f37-d9ea-0310-8a92-e5e31aec5664
Removed API key

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/branches/upgrade_to_v3@1028745 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added a setting to edit the Google API Key.

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/branches/upgrade_to_v3@1029131 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated documentation with calendar ID and API key information.

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/branches/upgrade_to_v3@1029146 b8457f37-d9ea-0310-8a92-e5e31aec5664
More readme.txt updates

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/branches/upgrade_to_v3@1029151 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed the stand_alone.html example.

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/branches/upgrade_to_v3@1029162 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merged upgrade_to_v3 branch back to trunk

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/branches/upgrade_to_v3@1029169 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merged upgrade_to_v3 branch back to trunk

git-svn-id: https://plugins.svn.wordpress.org/google-calendar-widget/trunk@1029174 b8457f37-d9ea-0310-8a92-e5e31aec5664