ext lib otshell_utils. Fast cmake using it; doc;

Preparing stage for upcoming work:
- added used by me logging mini library (otshell_utils)
- and other small misc tools
- cmake, and doc licence for the above (tested on linux, debian 7+new gcc)
- default fast build (for developers) by disabling some modules and tests
- readme describing the above; and small update for win32 msys
- script to run other program/options from "make run" (useful for some IDEs)
- some docs
- gitignore updated
- my public key