Merge branch 'ta/doc-no-small-caps'

Update documentation to change "GIT" which was a poor-man's small caps to "Git". The latter was the intended spelling. Also change "git" spelled in all-lowercase to "Git" when it refers to the system as the whole or the concept it embodies, as opposed to the command the end users would type. * ta/doc-no-small-caps: Documentation: StGit is the right spelling, not StGIT Documentation: describe the "repository" in repository-layout Documentation: add a description for 'gitfile' to glossary Documentation: do not use undefined terms git-dir and git-file Documentation: the name of the system is 'Git', not 'git' Documentation: avoid poor-man's small caps GIT