[#40] Update CHANGELOG

Author: Fyorl

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ### Improvements
  - Attempting to unpack a directory that is not a valid LevelDB database now throws an error.
+ - (BoltsJ) Added the `--config` command-line flag. Configuration options read from this file will be merged with the global `.fvttrc.yml` configuration options.
  - (Jeff Hitchcock) Added the `--folders` command-line flag, and corresponding `folders` parameter to `extractPack`. When used, this option writes the pack's entries to a directory structure matching the pack's internal Folder document structure.
 
 ### Fixes