Updated RPM build dependencies

Updated email in README.md

Tagged version 1.3

Fixed obsolete examples/myshell.

Updated version numbering code.

* Now uses 'git describe --tags' output, just replacing dashes with dots for
  compatibility with RPM version numbers.
* For coherency, RPM and debian version numbers are now the same.
* Removed the timestamp, as it is not needed anymore (even when reordering
  commits, the version is non-ambiguous, as for non-tagged commits we have part
  of the last commit hash and the number of commits since last tag).

Initial configshell commit

Signed-off-by: Nicholas A. Bellinger <nab@risingtidesystems.com>