tests for directory existing before deleting NTA and BUILDDIR. adds creation of intermediate directories, if any, for BUILDDIR
changes NUPIC shell environment variable to NUPIC_HOME
adds: logging out put per build phase, comments and readability whitespace. sets sane defaults. updated README with changes
adds paranoia check before final call to rm
Added a link to numenta.org in the README for casual browsers.
fix merge
adds directory checks before calls to rm. adds sane default settings for build environment variables.
fixes directory checks
removes _HOME suffix to NUPIC in README
adds newline to end of build script file
fixes syntax error
Merge pull request #29 from ravaa/upstream-master

Sets up sane defaults and checks for directories before calling rm
Remove reference to grokengine-default.xml config file, not relevant to NuPIC,
reverting 24b16d61594b5125471bd6eb061b089abdaf19c7 in the process.  Fix
super() calls in py/nupic/support/configuration_custom.py
Merge pull request #28 from rhyolight/add-a-link-ta-home

Added a link to numenta.org in the README for casual browsers.
Merge pull request #31 from oxtopus/grokengine_configuration

Remove reference to grokengine-default.xml config file, not relevant to ...