Merge pull request #245 from andygup/fix_gh-pages

v2.1.1
Closes #249 - add public proxyPath
switch to using proxyPath
update to JS API 3.10
switch to using proxyPath
update to JS API 3.10
updated to use proxyPath
updated to JS API 3.10
Update docs for proxyPath
removed proxy references. Not needed.
Closes #248 - removes proxy dir
added link to arcgis proxy doc
closes #247 - tpklayer init autoCenter
Closes #233 - rename isDBWriteable()
Closes #242 - replace constructor properties
minor tweak to .gitmodules
Closes #243 - update submodules
adds isDBValid() to TPKLayer
Closes #238, load tiles from URL
v2.2