Created SCons script to run OpenVisualizer in local build directory.

SConstruct -- SCons script

moteStateGui.py -- Expects command line option for application directory.
Expects logging config file in this directory, and writes log files thee.
Added command line usage output if option is not provided.

logging.conf -- Reads provided directory for logging output.

.gitignore -- Add Scons files and build directory; remove log files since no
longer present.