Release 0.10.0

Highlights

• The Zephyr CoAP library is now used instead of libcoap for Zephyr ports
• Zephyr ports can specify a TLS credential tag to use for authentication,
  in particular this will enable the use of offloaded DTLS sockets.

Breaking Changes

• Remove golioth_ prefix from filenames and move header files under
  golioth/ folder.
• Remove golioth.h header - users must now include individual headers
  for each service that they use.
• Stream and State: change json and cbor object set calls to specify
  type in the parameters (instead of separate function calls).
• RPC: This service must now be initialized prior to use by calling
  golioth_rpc_init(client);
• Settings: This service must now be initialzied prior to use by calling
  golioth_settings_init(client);
• Services (e.g. stream, fw_update, etc.) are disabled by default - be
  sure to enable them in your project configuration.
• Typedefs have been removed throughout the codebase - instead use the
  underlying struct or enum types
• Remove lightdb_ from lightdb_stream functions to differentiate from LIghtDB State

Added:

• Automated Hardware-in-the-Loop test framework
• Basic cross-platform connection HIL test
• Tests for all Zephyr examples
• Add kconfig option for default log level for SDK logs
• Lightb State examples now show how to use CBOR

Changed:

• Improved network connection management
• Wait for network traffic and request queue concurrently - this
  removes the need to wakeup every 1 second to check for requests
• Pass structs by reference instead of value in golioth_sys_* APIs
• Use bool instead of int for binary Kconfig options
• Improved organization of Kconfig options
• ESP-IDF examples use FreeRTOS APIs directly instead of Golioth
  abstractions
• LightDB State and Stream are now separate services in the SDK
• DFU example has been renamed to fw_update
• Use golioth_content_type enum instead of libcoap content types

Removed:

• Magtag demo for ESP-IDF - this hardware is out of stock
• Golioth time module - this was a thin wrapper around golioth_sys
• golioth_statistics module - this internal memory tracking module
  is being replaced by out-of-source tooling
• remote_shell - This was an experimental feature that was never
  released. If you are interested in remote shell functionality in
  the future, please reach out to Golioth!
• Integration guide - see docs.golioth.io for the latest documentation
  on integration Golioth into your product

Fixed:

• Various documentation fixes
• Removed double check for CONFIG_GOLIOTH_SAMPLE_COMMON
• Fix stack overflow in logging thread
• Drop logs with unsupported log levels
• Attempting to use a disabled service now fails at build time instead
  of at run time