Improve resource loading and other enhancements

Improve resource loading and other enhancements

PHP

• All components now in own namespace
• All components return a \DOMNode
• Add initial batch of request handlers
• No forms in loaded pages
• Check for required PHP modules
• Send console headers before exit

JavaScript

• Do not extend native JavaScript objects
• Update polyfills so no errors are thrown
• Use simpler loading of default module
• All code passes Eslint
• Close <dialog>s when clicked outside of
• Close <dialog>s on escape press
• Remove <dialog> backdrops on close/remove
• Do not close <dialog>s containing <form>s
• Move most anonymous functions to named functions
• Disable clicks on links and buttons that are loading

Miscellaneous

• Update README
• Add contributing guidelines and issue template
• Configure NPM, Babel, ESLint
• Add more useful script to NPM
• NPM installs all dependencies
• Git hooks for pre-commit & post-merge
• Update icons
• Add GPG keys for verifying tags
• Travis-CI now tests PHP & JavaScript
• Update submodules to current versions
• Remove and ignore all generated resources

Update submodules and improve loading of resources

• shgysk8zer/dom, shgysk8zer0/core, & shgysk8zer0/core_api @ current
• Replace usage of load function with \shgysk8zer0\DOM\HTMLElement::__invoke
• Delete functions.php do not require
• All components scripts return created nodes instead of appending

Improve loading of resources and add contributing resources

• Close <dialog>s on escape press or when clicked outside of
• Add templates for pull-requests and issues
• Add CONTRIBUTING.md
• Load README.md via fetch
• Implement MutationObserver to respond to various node and attribute changes
• Update CSS and SVG sprites

Initial release

• Added PHP classes as submodules
• Configured ECMAScript modules
• Created stylesheets using CSS vars
• Created output for CSS and JavaScript
• Configured autoloader for PHP classes
• Created basic Travis-CI testing script
• Added various configuration files, including ESLint, Babel, etc.
• Created combined SVG icon file using <symbol>s
• README contains essential information and guidelines