oq-ui-client2/src/Leaflet.Coordinates:

Added leaflet coordinates plugin.
oq-ui-client2/exposure_export.html:

Include leaflet Coordinates plugin (for displaying mouse position coordinates).
oq-ui-client2/src/exposure/exposure_export.js:

Added mouse coordinates heads-up-display to the map (using a leaftlet
plugin).
opengeosuite-sdk/build.xml:

Added build step for copying leaflet coordinates plugin.
update the help tool tip
set map bounds so the user is not able to pan byond 180 and -180 long
move the leaflet draw tool in the ui to avoid conflicts
Removed duplicate copy tag in build.xml
Merge pull request #39 from gem/exposure-ui-enhancements

Exposure UI enhancements

[r=matley] [f=1187416]