Update README.md

typo
merge updated README.md into this branch
add licenses and javadoc to source bundle
add root folder to sources for org.jboss.tools.locus.sf.saxon/9.2.1
JBIDE-12815: Mockito: add licenses and javadoc to source bundle; add licenses to binary bundle
add source bundles to the site; remove fetch-zips-for-aggregate step (shouldn't be in there)
JBIDE-12815 fix provider names and get consistent w/ pluginName+providerName variables
add customized HTML page for update site w/ warning about licenses (JBIDE-12815)
add customized HTML page for update site w/ warning about licenses (JBIDE-12815)