Summary
- updated news
- get rid of visibility in MaSh -- it slows it down more than it helps
- merged
- updated polyml platform: 32=x86_64_32;
- more thorough purge_platforms;
- clarified ML_OPTIONS on Windows;
- more operations;
- new material about summations and powers, along with some tweaks
- dedicated combinator for declarations nested in a local theory block
- more conventional parsing of code_stmts antiquotation
- more conventional syntax for code_stmts antiquotation