If an external muparser is not found, fall back to building the bundled one.

Signed-off-by: Tamas TEVESZ <ice@extreme.hu>
Build bundled muparser on Windows

Signed-off-by: Tamas TEVESZ <ice@extreme.hu>
Update notes for FreeBSD; amend Windows notes wrt. muparser.

Signed-off-by: Tamas TEVESZ <ice@extreme.hu>
Include logic to build the bundled muparser on OS X in muparser.pri;
Update README accordingly.

Signed-off-by: Tamas TEVESZ <ice@extreme.hu>
unix: ignore ttf2lff if freetype2 is not found
disabled plotequation plugin
fixed bundled muparser build on win32
initial ruler implementation
added view to ruler
file cleanup
rs_grid: metaXY by std::vector
grid cleanup: pts by std::vector
added tick marks