Include unistd.h in the unix implementation source of QLockFile

This is necessary to avoid hidden dependencies for int gethostname(char *name,
size_t namelen);

This was revelead while backporting the class to Qt 4 for QtSerialPort.

Change-Id: I1c477d295eeae90b3136fc6aae5d45982d5b1d73
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
qmake: Pick up default bundle prefix from Xcode preferences

But still fall back to 'com.yourcompany', just like Xcode does for the
initial launch.

Change-Id: I89afadefafc254a0014aca197741d42a0199943e
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
QFileDialog: document the consequences of being "widgetless"

After 37ca2224eca671200a2710f57f970d2993e62aa5 it's an exposed
behavior change that the widgets and related paraphernalia don't exist.

Task-number: QTBUG-34100
Change-Id: Ie0ebcb8c5c5668b6c12c5447f25bfbfd893dec6c
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Store the font's scalability in QFontEngine.

This is an enabler to fallback to native font rendering when using a
bitmap font in Qt Quick.

Task-number: QTBUG-32737
Change-Id: I6d841dd5ef54d78a00f7fab9d80e9c95ff7f7b98
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
fix filtering of system paths

the path filtering functions assume that DEFAULT_{INC,LIB}DIRS are
newline separated lists of unquoted strings, which 8fbf959be broke.

Task-number: QTBUG-33714
Change-Id: Ie07909963ac5155a8ac79ca9254f34069925e001
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
fix VS version selection

On machines where multiple versions of VS are installed, the VS version
for the vc(x)proj generator is selected by the entries in the PATH
variable. The first VS installation that's found in PATH is used.

The former logic printed a warning if multiple VS installations were in
PATH and also fell back to the lowest version if a VS version was
registered with multiple install paths.
That's the case for VC 2012 express and prevented its usage.

Task-number: QTBUG-34357
Change-Id: Ia5c66a1aea0c40e4b7460b3aa6c7daee6673da44
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>