Fix notices during export

Notice: Trying to get property of non-object in /home/ess/public_html/wp-includes/general-template.php on line 1471
Add Chinse language

Add Chinese language file。
Adding strings to localizations
Fix string to update the translations

Here, Search as a verb (in line 591, as a noun)
Fixing some misspelled words
Adding new and updated pt-br language files
Fix href url for changelog tab
Increaze min-height css value for add-on divs
更新翻译
Updates to filter 'acf/get_post_id' - validate post_id type to int

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Allow post_id to be numeric or string type

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Updates to image JS

Signed-off-by: Elliot Condon <e@elliotcondon.com>
minor updates

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Merge pull request #63 from iwillhappy1314/master

Add Chinese languange file
Fixed WYSIWYG format_for_api by adding a new filter 'acf_the_content'

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Major improvements to input JS ( hide / show metabox)

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Adding 'whats new' to plugin update screen

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Updates to acf_form function

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Updating version to 4.1.5

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Minor updates to image / file js

Signed-off-by: Elliot Condon <e@elliotcondon.com>