This is basically a continuation of the commits which
refactor code out of the base text editor. For instance,
36fa1de4 and
3a684586.

Also removed the doXXXX() forwarding methods.

Attributes, uniforms, varyings, and constants are shown with a
distinguished icon that is different from regular variables.

The Qt variant is almost exactly the same as GLSL/ES,
so there is little point having a separate variant code.

*.vert and *.frag are now for desktop shaders
*.vsh and *.fsh are now for ES shaders
File/New gives the user the choice which to create

Because the order of the commands can be changed the reparenting was
changed. Now there is a command with the exact order of child items so
it should be much more correct.

The QmlJS Parser is checking the source file so we don't need to use the QmlEngine anymore.

Task-number: QTCREATORBUG-3222

Reviewed-by: kh1

Reviewed-by: kh1

Task-number: QTCREATORBUG-3160
Reviewed-by: con

Some more value fixing/support double-quoted commands in extension.
Functionality for printing command help.

Reviewed-by: kh1

Use the editor's displayName for the window title.
Also there were missing change signal emissions in setDisplayName
implementations.
Moves the actual handling of the window title from Session to
EditorManager (so it now is also done for the hypothetical case of no
project explorer plugin).

Task-number: QTCREATORBUG-3207

We didn't watch the symbolic link itself before, only the final link
target. We are watching the symbolic link and the final link target now.
Ugly hack: We need to work around QTBUG-15522. The inotify and kqueue
based file system watcher engines (Linux + Mac) don't report changes to
symbolic links. The workaround is to use the polling engine *only for
the links themselves*. The only way to force the use of the polling
engine is by using the auto test hook in QFileSystemWatcher.

Reviewed-by: hjk

Reviewed-by: hjk