LPS-34182 Refactor content reference export

Conflicts:
	portal-service/src/com/liferay/portal/kernel/lar/ExportImportUtil.java
LPS-34825 Integration test for content reference export/import
LPS-34825 SF
LPS-30240 SF
LPS-34013 Upgrade "build-alloy" task to handle Alloy 2.0 folder structure and bootstrap.css
LPS-34023 Updating Alloy loader modules
LPS-34046 Create browser selectors module on liferay
gitignore
LPS-34052 Create liferay-node module
LPS-34070 Upgrade A.ButtonItem and A.Toolbar components
LPS-34045 Upgrade paginator component
LPS-34012 SF
LPS-34023
LPS-34117 Replace AUI.defaults by A.config
LPS-34148 Upgrade aui:button taglib (Manual)
LPS-34148 Upgrade aui:button taglib (Generated)
LPS-34148 Updating references
LPS-34148 Fixing CSS selectors
LPS-34013 Normalize aui-skin-deprecated image paths on build-alloy
LPS-34206 Upgrade liferay dialogs to bootstrap markup using the new A.Modal class

LPS-34206 Source Formatting