v0.0.2

New feature

• pid S4 object class for results of record_group(). This will replace the current default (data.frame) in the next major release
• epid S4 object class for results of episode_group(), fixed_episodes() and rolling_episodes(). This will replace the current default (data.frame) in the next release
• to_s4() and to_s4 argument in record_group(), episode_group(), fixed_episodes() and rolling_episodes(). Changes their output from a data.frame (current default) to epid or pid objects
  -to_df() changes epid or pid objects to a data.frame
  deduplicate argument from fixed_episodes() and rolling_episodes() added to episode_group()

Changes

• fixed_episodes() and rolling_episodes() are now wrapper functions of episode_group(). Functionality remains the same but now includes all arguments available to episode_group()
• Changed the output of fixed_episodes() and rolling_episodes() from number_line to data.frame, pending the change to epid objects
  pid_cri column returned in record_group is now numeric. 0 indicates no match.
  columns can now be used as criteria multiple times record_group()
  #6 - number_line objects can now be used as a criteria in record_group()

Bug fixes
#3 - Resolved a bug with episode_unit in episode_group()
#4 - Resolved a bug with bi_direction in episode_group()