Notes about the icu directory.

The files in this directory were written for the node.js effort. It's the intent of their author (Steven R. Loomis / srl295) to merge them upstream into ICU, pending much discussion within the ICU-PMC.

icu_small.json is somewhat node-specific as it specifies a "small ICU" configuration file for the icutrim.py script. icutrim.py and iculslocs.cpp may themselves be superseded by components built into ICU in the future.

The following tickets were opened during this work, and their resolution may inform the reader as to the current state of icu-trim upstream:

• #10919 (experimental branch - may copy any source patches here)
• #10922 (data packaging improvements)
• #10923 (rewrite data building in python)

When/if components (not including the .json file) are merged into ICU, this code and configure will be updated to detect and use those variants rather than the ones in this directory.