Update install documentation for the css/sass info

[Robert Lyon]

Currently the documentation says we need to run gulp on install - but that is only true if we install via git

[Aaron Wells (u-aaronw)]

One place this is documented is in htdocs/theme/README.md

It may also be a good idea to add some info about themes in the primary README.md file.

And we should search the wiki to see what theme instructions are in there that need to be updated.

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/5734

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/5734
Committed: https://git.mahara.org/mahara/mahara/commit/8c223036f0e2190367d9dc5b0bdab3cf60108303
Submitter: Aaron Wells (<email address hidden>)
Branch: master

commit 8c223036f0e2190367d9dc5b0bdab3cf60108303
Author: Robert Lyon <email address hidden>
Date: Wed Nov 18 12:47:24 2015 +1300

Bug 1517256: Updating the Readme file in the theme dir

To let users know they cannot customise themes with gulp/sass if they
have the zip version of Mahara from launchpad as important files
are not present.

It lets them know they need to get the zip from http://git.mahara.org
which will have all the extra stuff.

behatnotneeded: change to readme file

Change-Id: I7ae3e05340b54bc037f4b6856ecb237f9611b7e4
Signed-off-by: Robert Lyon <email address hidden>

[Mahara Bot (dev-mahara)]

Patch for "15.10_STABLE" branch: https://reviews.mahara.org/5740

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/5740
Committed: https://git.mahara.org/mahara/mahara/commit/de15d73013cb745d7a0701b14b694e4869be3b2f
Submitter: Aaron Wells (<email address hidden>)
Branch: 15.10_STABLE

commit de15d73013cb745d7a0701b14b694e4869be3b2f
Author: Robert Lyon <email address hidden>
Date: Wed Nov 18 12:47:24 2015 +1300

Bug 1517256: Updating the Readme file in the theme dir

To let users know they cannot customise themes with gulp/sass if they
have the zip version of Mahara from launchpad as important files
are not present.

It lets them know they need to get the zip from http://git.mahara.org
which will have all the extra stuff.

behatnotneeded: change to readme file

Change-Id: I7ae3e05340b54bc037f4b6856ecb237f9611b7e4
Signed-off-by: Robert Lyon <email address hidden>
(cherry picked from commit 8c223036f0e2190367d9dc5b0bdab3cf60108303)