Installer: Added link to JED and setting to remove it
Installer: Added spindle-wheel javascript for installations to Isis
Installer: Added spindle-wheel javascript for installations to Isis
Installer: Added support for update.xml file urls for Install from URL method.
Installer: Fixed error in displaying Install from URL error, sprintf was missing for error-code
Added triggers for installation pre-flight and post-flights for custom installations, and fixed Hathor styling
Install from Web installer: Added language strings and fixed language string issue.
Add some more test cases, tests and some infrastructure for JHelper
package.
Added out-of-English-JED-content strings to installer language file for translation by translation teams
Added the 2 webinstaller plugin translation files for name and description translation at install time and in plugins manager, so they get translated by translation teams too
Added the new settings for first or last tab strings into the webinstaller plugin translation file for translation teams
Fixed event for adding as last tab and removed unneeded parameter for template name
Improved language strings for the setting and added tooltip to the Close box
Improved language strings for Joomla! Extensions Directory to match exactly the official name
Merge pull request #2149 from elinw/helpertests

Add some more test cases and tests to JHelper.
Merge pull request #2143 from beat/feature-apps-installer-of-installer

JED info link in extensions installer and 1-click installer of "install from Web" plugin
[#31347] Introducing HTML5 form fields and attributes - GSOC (Fix #1842)