Release v0.4.0

[v0.4.0]

Added

• Add derived total_accel column to Flysight V2 IMU sensor dataframe, calculated as a vector sum of the xyz acceleration components
• Add pyflysight.log_utils.locate_log_subdir helper for resolving child log directory from a given top-level directory
• Add pyflysight.log_utils.iter_log_dirs helper for iterating through child log directories of a given top-level directory
• #19 Add pyflysight.config_utils for config file generation
• #19 Add pyflysight.flysight_utils with helper utilities for working with connected FlySight devices