note.for.update.readme

1. cache repository:
	- org.idempiere.p2.targetplatform.target
		when update url of repository on target file, should change name of target also. format suggest idempiere-yymmdd
	- repository on POM file (org.idempiere.parent/pom.xml)
		each repository link should have unique id
			<repository>
            	<id>${idempiere-equinox-repository-id}</id>
            	<url>${idempiere-equinox-url}</url>
                <layout>p2</layout>
            </repository>

        when change value of url change value of id also

2. feature
	when feature list on org.idempiere.p2/category.xml change (version, delete, add,...) do update this file before build

3. build
	maven to p2 ([idempiere-root]/org.idempiere.maven.to.p2) build with profile buildP2FromMaven
	mvn verify -P buildP2FromMaven

4. equinox repository link
on org.idempiere.parent/pom.xml have two link idempiere-equinox-url, idempiere-orbit-url
it for run tycho-eclipserun-plugin and target for run standalone bom like org.idempiere.maven.to.p2

it's don't need up to date and don't need same to link on org.idempiere.p2.targetplatform.target
but better make it same