migrated Xtend to new CA base classes

Change-Id: Ie5d04a0bae6ccb4729d1ee272f3a1ff19dcaca6f
renamed new ParserBasedCACF to DelegatingCACF

this avoids having yet another package and the name is more fitting for
the implementation

Change-Id: Iafab0bf279091b09c8a41dd96e3569007b77621d
include xtend in idea update site

Change-Id: I79db84b57eda74c36ee89899bc3fef9ddd260ab0
do not require line information for content assist

Change-Id: Ief6c5ef3df51c92f072349fdb7469e44c1d962da
Merge "migrated Xtend to new CA base classes"
Merge "renamed new ParserBasedCACF to DelegatingCACF"
Merge "include xtend in idea update site"
Merge "do not require line information for content assist"