gitignore: Add line to ignore the Sphinx documentation build output

Signed-off-by: George K. Thiruvathukal <gkt@cs.luc.edu>
doc: Initial work on Biosal documentation (in Sphinx)

Signed-off-by: George K. Thiruvathukal <gkt@cs.luc.edu>
doc: Add introduction to BIOSAL project

Signed-off-by: George K. Thiruvathukal <gkt@cs.luc.edu>
doc: Add support for more concise section navigation in HTML output

Signed-off-by: George K. Thiruvathukal <gkt@cs.luc.edu>
doc: Update index with biosal.rst as a chapter

Signed-off-by: George K. Thiruvathukal <gkt@cs.luc.edu>
Merge branch 'master' into granularity