Updated code for handling dynamic lat-lng values#1

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micahbule wants to merge 2 commits intocornflourblue:masterfrom

micahbule:master

Commits on Sep 16, 2015

Used scope instead of attributes to avoid curly-brace expression bindings in the DOM.
Mico
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Commits on Dec 7, 2015

Added mapsAPI promise in cases that it's asynchronously loaded
Mico
committed