Fix for bug #17456 (Multiple resources are destined for same filename
errors)
update core.zip to CLDR v25 and number.xsl accordingly to latest
CLDR modifications, refs #17770
refs #17770. CDLR v25 introduces alternate narrow symbol, skip them.
fix #17429 optimizeCss can produce invalid CSS for unresolved @imports

* Updated optimizeCSS transform to hoist imports.
* Change unresolved imports from an error to a warning.
Remove deprecated JSSourceFile references

Fixes #17809.
fix file permissions, fixes #17919 in util
strip BOM from all text files, not just CSS files, fixes #17271
Add prerelease and major version support to build script
Updating metadata for 1.10.0-beta1
Updating source version to 1.10.0-pre