Convert CONTRIB.md and README.md to RST.
README: Use definition list to list projects.
protobufs: Convert README.md to README.rst.
client-java: Convert README.md to RST.
benchmarker-java: readstore-local-java: Convert MD to RST.
client-python: Convert README.md to RST.
client-r: Convert README.md to RST.
client-java: Fix bullet list not indended properly.
mapreduce-python: Convert README.md to RST.
CONTRIB.rst: Fix indentation on CLA lines.
Merge pull request #21 from namn/convert-md-to-rst

Convert Markdown files to ReStructuredText