Fix text domain in PHPCS config

See merge request !9

Fix translation support

See merge request !8

Bump WP compatibility

See merge request !7

Bump WP compat

See merge request !6

Bump WP compat

See merge request !5

Bump WP compatibility

See merge request !4

Bump WP compatibility

See merge request !3

Bump WP compatibility

See merge request !2

Add automated WP.org deploys

See merge request !1

Security update: correct misuse of `add_query_arg()` as identified by Sucuri: https://blog.sucuri.net/2015/04/security-advisory-xss-vulnerability-affecting-multiple-wordpress-plugins.html.

Allow default options to be translated. The balance of the plugin is translation-ready, but this was overlooked.

Introduce magic getter and make class properties private. Allows for properties to be protected in the future. Since they've been public up to now, all are available through the getter.

Convert plugin to a singleton pattern, aliasing former global variable `$wpf` in case users are referencing it.

Before making any changes to post content or outputting any information gleaned from the post content, check if a password is required and has been provided if needed.

See https://github.com/ethitter/WP-Print-Friendly/pull/4.

If WordPress determines the request is a 404, such as when a user who can't read a specific privately-published posts attempts to do so, prevent plugin from acting by setting `is_print()` to false.

See https://github.com/ethitter/WP-Print-Friendly/pull/4.

See https://github.com/ethitter/WP-Print-Friendly/pull/4.