Beta 5

This release improves the robustness of CartoContext.write, adds some functionality wins for styling options, has better handling of DataFrame indexes for write operations, and gives animated maps with column-based styling a more solid footing.

• Fix timestamp granularity: true timestamps instead of dates are captured in write operations
• DataFrame Indexes are dropped in write operations if they are pandas defaults, otherwise they are written as normal columns on CARTO
• Adds client param to show cartoframes usage on platform
• Updates styling methods to make them more configurable
• Greatly improves robustness of Torque maps which are styled