Task-number: QTCREATORBUG-1169

Also removed TokenUnderCursor as it's functionality is in the token cache.

Reviewed-by: ckamm

 - lessens open file handles
 - improves help plugin startup further

Task-number: QTCREATORBUG-337
Reviewed-by: ck

This reverts commit c2393df0.

This should speed things up a bit, because before, the line was tokenized at
least 3 times.

Was broken in 915a07bd, which caused
help links only to be resolved for expressions under the cursor.

Task-number: QTCREATORBUG-159
Reviewed-by: ckamm

Since the fix in 01a0ec16, sometimes
& would turn up in the tooltips due to them being escaped but not
interpreted as HTML.

Turns out the <nobr> actually caused wrapping in some cases because the
tag made the QToolTip turn on its wrapping feature due to the text being
rich text. So avoid adding it to plain text tooltips unnecessarily.

Reviewed-by: hunger
Task-number: QTCREATORBUG-1169

If the generated documentation doesn't contain the namespace name,
we failed to look up the correct help page.

Task-number: QTCREATORBUG-946
Reviewed-by: Erik Verbruggen

Reviewed-by: Thorbjørn

foreach()-Loops.

Encapsulate the details.

Remove overlap. Add extra selection tooltips for the cpp hover handler.

Fixes a segfault when hovering over QtCleanUpFunction in
qcoreapplication.h.

Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

Makes context sensitive help work for valid expressions that happen to
be part of a marked diagnostic error. However, for now you still can't
get documentation for expressions that don't resolve.

Also, context sensitive help now also works for includes where possible.

Reviewed-by: Trust Me

Conflicts:

	src/libs/cplusplus/CppBindings.cpp
	src/libs/cplusplus/CppBindings.h
	src/libs/cplusplus/FastPreprocessor.cpp
	src/libs/cplusplus/FastPreprocessor.h
	src/plugins/cpptools/cppcurrentdocumentfilter.cpp
	src/plugins/cpptools/cppcurrentdocumentfilter.h
	src/plugins/cpptools/cppsemanticsearch.cpp
	src/plugins/cpptools/cppsemanticsearch.h
	src/plugins/duieditor/parser/qmljs.g
	src/plugins/duieditor/parser/qmljsast.cpp
	src/plugins/duieditor/parser/qmljsast_p.h
	src/plugins/duieditor/parser/qmljsastfwd_p.h
	src/plugins/duieditor/parser/qmljsastvisitor.cpp
	src/plugins/duieditor/parser/qmljsastvisitor_p.h
	src/plugins/duieditor/parser/qmljsengine_p.cpp
	src/plugins/duieditor/parser/qmljsengine_p.h
	src/plugins/duieditor/parser/qmljsgrammar.cpp
	src/plugins/duieditor/parser/qmljsgrammar_p.h
	src/plugins/duieditor/parser/qmljslexer.cpp
	src/plugins/duieditor/parser/qmljslexer_p.h
	src/plugins/duieditor/parser/qmljsmemorypool_p.h
	src/plugins/duieditor/parser/qmljsnodepool_p.h
	src/plugins/duieditor/parser/qmljsparser.cpp
	src/plugins/duieditor/parser/qmljsparser_p.h
	src/plugins/duieditor/parser/qmljsprettypretty.cpp
	src/plugins/duieditor/parser/qmljsprettypretty_p.h
	src/plugins/duieditor/rewriter/rewriter.cpp
	src/plugins/duieditor/rewriter/rewriter_p.h
	src/plugins/duieditor/rewriter/textwriter.cpp
	src/plugins/duieditor/rewriter/textwriter_p.h
	src/shared/cplusplus/ASTClone.cpp
	tests/manual/cplusplus/main.cpp

Reviewed-by: Trust Me

Didn't check whether the lookup actually returned a valid symbol before
accessing the name.

Reviewed-by: Roberto Raggi