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

Documentation/howto/maintain-git.txt

@@ -1,7 +1,7 @@
 From: Junio C Hamano <gitster@pobox.com>
 Date: Wed, 21 Nov 2007 16:32:55 -0800
 Subject: Addendum to "MaintNotes"
-Abstract: Imagine that git development is racing along as usual, when our friendly
+Abstract: Imagine that Git development is racing along as usual, when our friendly
  neighborhood maintainer is struck down by a wayward bus. Out of the
  hordes of suckers (loyal developers), you have been tricked (chosen) to
  step up as the new maintainer. This howto will show you "how to" do it.
@@ -13,7 +13,7 @@ How to maintain Git
 Activities
 ----------
 
-The maintainer's git time is spent on three activities.
+The maintainer's Git time is spent on three activities.
 
  - Communication (45%)
 
@@ -90,7 +90,7 @@ this mailing list after each feature release is made.
 A Typical Git Day
 -----------------
 
-A typical git day for the maintainer implements the above policy
+A typical Git day for the maintainer implements the above policy
 by doing the following:
 
  - Scan mailing list.  Respond with review comments, suggestions