This includes a SHA256 implementation which is _not_ intended for secure
cryptographic operations; see src/js/sha256.js header for more information.
* src/current/compiler/js.xsl (compiler:static): Echo src/js/sha256.js.
[map_method_uppercase, map_method_hash]: New functions.
* src/current/link.xsl: Include dslc-base.xsl.
* src/js/sha256.js: New file.