child theme function override for navigation.php

Wrap navigation.php functions in ```if ( ! function_exists( ' ' ) ) {}``` to provide override support for child themes.
Spelling correction
Merge pull request #93 from jmotes/patch-1

Spelling correction
Merge pull request #88 from fourhexagons/override-nav

child theme function override for navigation.php
Credited author of img_unautop snippet
class and id attributes for img caption shortcode

The 'id' and 'class' attributes for an image caption (as can be specified by the admin) will now be output as would be expected. (Unlike WP's img_caption_shortcode function (in WP's includes/media.php file) I have intentionally not output 'wp-caption' or the align attributes in the 'class' value in case this may interfere with the FoundationPress layout.)
Merge pull request #98 from jhodgski/master

class and id attributes for img caption shortcode
Updated Foundation to version 5.4
Updated settings scss and css to Foundation version 5.4
Updated versioning of the theme. The version number will now reflect what version of Foundation it supports, at all times
Added Foundation icon fonts. Added icon-bar to kitchen-sink page template
Added a custom js folder. Every script you put in this folder will be concatinated to app.js. Gruntfile updated.
Updated documentation
Revert "Updated documentation"

This reverts commit b86e79caeec5f5d03c38bdb8b27e9b3d62102df6.
German language files added

created with CodeStyling Localization
renamed spanish language files

the spanish language files should be named to es_ES instead of es
Update documentation
corrected textdomain for theme translation
Off-canvas toggle button bug now works as expected in iOS
Added tags for improved accessibility