mapable? updates

This change updates the mapable? method in family by converting the
values to floats rather than integers.  The reasoning here is that
a longitude of -0.967373 (for example), converted to an integer,
evaluates to 0.0, which fails the mapable? check.  We also update
mapable? in the group model to match that in family.

Note that a lat/long of 0.0 are actually valid, however this location
does not fall on land and therefore can probably be considered invalid.
Merge pull request #276 from mattt416/update_mapable

mapable? updates
Updated nl-NL locale files.
Added missing 'Default Country' translations.
Added a missing i18n string in people view
Merge pull request #278 from gustavobim/master

Added a missing i18n string in people view
Update packer config for Amazon AMI
Clarify anniversary field

* don't show on children
* show on family page only if first 2 adults having matching dates
* re-label "Wedding Anniversary"
Fix people form labels
Merge pull request #279 from churchio/wedding-anniversary

Clarify wedding anniversary
Fix bug viewing some updates
Allow showing hidden groups even when no results showing

fixes #281
Fix typo
Clarify purpose of 'Default Country' setting
Fix RemoveNotes migration

fixes #285

* delete all stream items referencing notes
* recreate the notes table and references when going down
Update image? method

We have run into a situation where this method generates an exception
when being run against a particular PDF that one of the members has
uploaded.  The actual issue lies w/ ImageMagick's identify, which
minimagick calls.  Note that we experience this issue in production
using ImageMagick 6.7.7-10, but not 6.8.9-7 which we use in development.

This change simply moves some of the functionaly in the image? method
to a new method and wraps it with some exception handling to handle
this particular failure scenario.

Closes #283
Ensure that family columns are referenced for sort
Allow import record match by id
Fix [#286] - add basic_auth to request and catch failures
Fix missing translation string for import