add support for :make
build by package if possible, create b:gopackage variable
add official Go 1.2 plugins
Merge branch 'go1.2'

Conflicts:
	compiler/go.vim
	ftplugin/go.vim
	ftplugin/go/fmt.vim
	ftplugin/go/import.vim
Merge pull request #15 from myxabrik/master

Merge with Go 1.2 plugins