in particular, merge the various 1.8.0b1/b2 sections, and remove the
datestamp. NEWS gets updated just before a release, doesn't need to precisely
describe pre-release candidates, and the datestamp gets updated just before
the final release is tagged
Also, I removed the BOM from some files. My toolchain made it hard to retain,
and BOMs in UTF-8 don't make a whole lot of sense anyway. Sorry if that
messes anything up.
It is not called "installing" because that implies that it is going to change the configuration of your operating system. It is not called "building" because that implies that you need developer tools like a compiler. Also I added a stern warning against looking at the "InstallDetails" wiki page, which I have renamed to "AdvancedInstall".
