Add --no-cache-dir flag for pip install commands (cztomczak#460)

Update tools

CEF Python v66.0 release

Fix build errors (cztomczak#403)

Change cef.Request.Flags options.

Update make_installer.py tool

Remove Frame.GetProperty/SetProperty deprecated methods from API docs.

This methods are not implemented. I guess they are remainings from
CEF 1 which ran using single process mode and getting/setting properties
worked synchronously. But in CEF 3 which runs in multi-process mode
you can do this only asynchronusly, you can use already implemented
js<>py communication layer for that.

Update to Chromium v57 on Win (cztomczak#341) and fix PyQt5 example o…

…n Win (cztomczak#325).

Fix PyQt5 support on Windows in qt.py example (cztomczak#325).

Update automate.py to use --ninja-jobs also when building CEF projects.
Default jobs ninja uses is very CPU intensive and can cause much lag in OS.

Update to Chromium 57.0.2987.133 on Linux PART 2 (cztomczak#341)

Fix build on Linux and fix logging function on Python 3 (cztomczak#352).

Fix PyBrowser references living forever (cztomczak#330).