update w32api and make versions

- Don't confuse novice users by explicitly naming automatically required packages; 'mingw-get install gcc' is sufficient to install mingwrt, w32api and binutils, in addition to the core C compiler. - Add preliminary notes about installing msys-base.

link to version of minw-get release notes that displays in the browser

convert automated installer instructions to the mingw-get installer

update and simplify

split "New to MinGW" material from instructions for installing MinGW

fix link to release notes for 4.5

add note about mingw-get and clarify that GCC 4.5 is currently only for testing purposes

add instructions for GCC 4.5

update to latest versions of binutils and mingwrt

update versions in installation example

update to latest version of make

add period before file extensions

update to latest version of API

add tar.bz2 files to the list of filetypes (for gdb)

disambiguate download requirements for multiple component packages.

Added a note about the automated installer not yet being updated for GCC 4. Updated list of files to include required runtime libraries from the release notes and *-dll files. Updated mingw-runtime and mingw32-make version.

update to latest versions of files

update mingw-runtime

With no heading above the first paragraph, the first heading runs too tight to the end of it; I added a block of one blank space, to force them apart. I also think we need more spacing between list items, (defined in CSS?); current layout just looks cluttered, IMO.