Alter build script.
Clear old clustering lib.
Squashed 'js/vendor/subtree-quick-cluster/' content from commit 1037efc

git-subtree-dir: js/vendor/subtree-quick-cluster
git-subtree-split: 1037efcc4bcc8ee5b063d11c635e694614bd508e
Merge commit 'd07cc3a5b64bb45b1b3db6bcc55bc1d1d5f57ba7' as 'js/vendor/subtree-quick-cluster'
Squashed 'js/vendor/subtree-quick-cluster/' changes from 1037efc..e38ee13

e38ee13 Unused property cleanup.
21cb9a0 Check for stacked point cluster.
0034790 Fix cluster toggle bug.
1dced34 infobox wire up

git-subtree-dir: js/vendor/subtree-quick-cluster
git-subtree-split: e38ee13b215b8d546fe6f3b07c29e25adca4f490
Merge commit 'e85c464b2320fe85e9ec2550366cb0f35ba62028'
Modify locations to use 'stacked' property.
Update code to work with updated clustering library.
Merge branch 'master' of https://github.com/spatialdev/OAM-PUBLIC