bug#24595: 24.5; Org manual indexing for #+STARTUP entries

[Drew Adams <drew.adams@oracle.com>]

See http://emacs.stackexchange.com/q/27523/105.

Finding information in the Org manual is not as easy as it should be.
There are no TAB (prefix) completions for "STARTUP", for example.

Using substring completion, with Icicles, I see all of these
completions:

#+STARTUP                        org-agenda-inhibit-startup       org-agend=
a-inhibit-startup <1>=20
org-hide-block-startup           org-set-startup-visibility       org-set-s=
tartup-visibility <1>=20
org-startup-align-all-tables     org-startup-align-all-tables <1> org-start=
up-folded=20
org-startup-folded <1>           org-startup-folded <2>           org-start=
up-indented=20
org-startup-with-inline-images   org-startup-with-inline-images <1>=20
org-startup-with-latex-preview   org-startup-with-latex-preview <1>=20
set startup visibility, command  =A1=AEalign=A1=AF, STARTUP keyword        =
 =A1=AEconstcgs=A1=AF, STARTUP keyword=20
=A1=AEconstSI=A1=AF, STARTUP keyword       =A1=AEcontent=A1=AF, STARTUP key=
word       =A1=AEcontent=A1=AF, STARTUP keyword <1>=20
=A1=AEcustomtime=A1=AF, STARTUP keyword    =A1=AEentitiesplain=A1=AF, START=
UP keyword =A1=AEentitiespretty=A1=AF, STARTUP keyword=20
=A1=AEentitiespretty=A1=AF, STARTUP keyword <1> =A1=AEeven=A1=AF, STARTUP k=
eyword     =A1=AEfnadjust=A1=AF, STARTUP keyword=20
=A1=AEfnauto=A1=AF, STARTUP keyword        =A1=AEfnconfirm=A1=AF, STARTUP k=
eyword     =A1=AEfninline=A1=AF, STARTUP keyword=20
=A1=AEfnlocal=A1=AF, STARTUP keyword       =A1=AEfnplain=A1=AF, STARTUP key=
word       =A1=AEfnprompt=A1=AF, STARTUP keyword=20
=A1=AEhideblocks=A1=AF, STARTUP keyword    =A1=AEhideblocks=A1=AF, STARTUP =
keyword <1> =A1=AEhidestars=A1=AF, STARTUP keyword=20
=A1=AEindent=A1=AF, STARTUP keyword        =A1=AEinlineimages=A1=AF, STARTU=
P keyword=20=20
=A1=AEinlineimages=A1=AF, STARTUP keyword <1> =A1=AElatexpreview=A1=AF, STA=
RTUP keyword=20
=A1=AElogdone=A1=AF, STARTUP keyword       =A1=AElogdrawer=A1=AF, STARTUP k=
eyword=20=20=20=20=20
=A1=AElognoteclock-out=A1=AF, STARTUP keyword =A1=AElognotedone=A1=AF, STAR=
TUP keyword=20
=A1=AElognoteredeadline=A1=AF, STARTUP keyword =A1=AElognoterefile=A1=AF, S=
TARTUP keyword=20
=A1=AElognoterepeat=A1=AF, STARTUP keyword =A1=AElognotereschedule=A1=AF, S=
TARTUP keyword=20
=A1=AElogredeadline=A1=AF, STARTUP keyword =A1=AElogrefile=A1=AF, STARTUP k=
eyword     =A1=AElogrepeat=A1=AF, STARTUP keyword=20
=A1=AElogreschedule=A1=AF, STARTUP keyword =A1=AElogstatesreversed=A1=AF, S=
TARTUP keyword=20
=A1=AEnoalign=A1=AF, STARTUP keyword       =A1=AEnofnadjust=A1=AF, STARTUP =
keyword    =A1=AEnofninline=A1=AF, STARTUP keyword=20
=A1=AEnohideblocks=A1=AF, STARTUP keyword  =A1=AEnohideblocks=A1=AF, STARTU=
P keyword <1>=20
=A1=AEnoindent=A1=AF, STARTUP keyword      =A1=AEnoinlineimages=A1=AF, STAR=
TUP keyword=20
=A1=AEnoinlineimages=A1=AF, STARTUP keyword <1> =A1=AEnolatexpreview=A1=AF,=
 STARTUP keyword=20
=A1=AEnologdone=A1=AF, STARTUP keyword     =A1=AEnologdrawer=A1=AF, STARTUP=
 keyword=20=20=20
=A1=AEnolognoteclock-out=A1=AF, STARTUP keyword =A1=AEnologredeadline=A1=AF=
, STARTUP keyword=20
=A1=AEnologrefile=A1=AF, STARTUP keyword   =A1=AEnologrepeat=A1=AF, STARTUP=
 keyword   =A1=AEnologreschedule=A1=AF, STARTUP keyword=20
=A1=AEnologstatesreversed=A1=AF, STARTUP keyword =A1=AEodd=A1=AF, STARTUP k=
eyword     =A1=AEoverview=A1=AF, STARTUP keyword=20
=A1=AEoverview=A1=AF, STARTUP keyword <1>  =A1=AEshowall=A1=AF, STARTUP key=
word       =A1=AEshowall=A1=AF, STARTUP keyword <1>=20
=A1=AEshoweverything=A1=AF, STARTUP keyword =A1=AEshoweverything=A1=AF, STA=
RTUP keyword <1>=20
=A1=AEshowstars=A1=AF, STARTUP keyword=20

Most of those, a user will never think of trying to complete with TAB.
In particular, why are things put between single-quotes?  That's not
very helpful for completion.

(As an aside, the names of many nodes in the manual use sentence case,
not title case.  Title case is the convention used for Emacs.  For
example, instead of `Visibility cycling' the convention is to use
`Visibility Cycling'.)

In GNU Emacs 24.5.1 (i686-pc-mingw32)
 of 2015-04-11 on LEG570
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --prefix=3D/c/usr --host=3Di686-pc-mingw32'