Removing references to Boost submission.
Updating whats new.
Simplifying doc config.
Updating version.
Adding index.rst to contents.
Updting minimum Boost requirement.
Updating reference on options.
Adding overloads to client facade.
Removing custom templates.
Fixing table.
Use sphinx theme
Revert "Removing custom templates."

This reverts commit 70c3d0fa3a40444b2f14e6a9ea4d097faf8638c8.
Bring back old styles.