Update subtree directory.
Squashed 'config/cmake/' changes from 01a0da5..5137da9

5137da9 Find installed components of ICU4C library.

git-subtree-dir: config/cmake
git-subtree-split: 5137da90f757ade86c2eb5c5f153c1c315a6cfde
Merge commit 'c1a3392496c786ecd9e38a0e8430a39b7541bde4'
Link to pandora documentation.