Added: fields layer
Removed: portal filtration
Merge pull request #728 from Fly33/master

Some changes
Fixed: don't do calculations when layers are off
Merge pull request #729 from Fly33/master

Fixed: don't do calculations when layers are off
s/poral/portal/
s/nxt/next/
Merge pull request #730 from nexushoratio/proofreading

Fix two typos.
munge fix: one function changed layout, breaking IITC's munge finding regular expressions
due to niantic site update 2014-01-13
bump mobile version number, for new public release