Merge pull request #4 from AndreMiras/feature/load_dependencies_errors

downloaded CDN dependencies to simplify local and offline development
Merge pull request #5 from AndreMiras/feature/horizontal_scrollbar

Feature/horizontal scrollbar
Merge pull request #7 from AndreMiras/feature/progress_bar

Feature/progress bar
Merge pull request #8 from AndreMiras/feature/browser_widget

Feature/browser widget
Added contributors sections
Update contributors in README file
Merge pull request #9 from AndreMiras/feature/delete_keyboard_shortcut

Feature/delete keyboard shortcut
Makes it possible to enable/disable table header with a boolean property (default to enabled).
Merge pull request #10 from AndreMiras/feature/table_header

Makes it possible to enable/disable table header with a boolean property...
Import / export mockups JSON, fixes #11
Removes old function call.
This function was removed in commit 468192b2620190aa868ace198d0fb7cb28bfb8dd, but not all refs to it were removed.
Merge pull request #13 from AndreMiras/feature/ticket11_import_export_mockups_json

Import / export mockups JSON, fixes #11
Merge pull request #14 from AndreMiras/feature/fix_object_has_no_method_toggle_navigation

Removes old function call.
Update style of textarea in export dialog
merged upstream