front: Fix in-game load-state regression.

Bug introduced in commit
53d7121d2636c3e449c9ef442a7787a4eb7ff73c
tools: Temporarily remove pull-upstream scripts.

The tools removed here will be coming back soon in a slightly altered
form.  I'm removing them now for safety as we administer to the git
repos.

We are migrating over to new upstream repositories.  We have created
official forks of the upstream repositories, and will be pushing our
android customizations to them from now on.  That will make it very
easy for other devs to see the changes we made to the upstream plugins
for the android edition.  Also makes it easy for other embedded system
ports (libretro, pandora) to pull just the plugins of interest out of
mupen64plus-ae.
cleanup: Rename native source directories to match upstream names.

audio-sdl     --> mupen64plus-audio-sdl
core          --> mupen64plus-core
front-end     --> mupen64plus-ui-console
gles2glide64  --> mupen64plus-video-glide64mk2
gles2n64      --> mupen64plus-video-gln64 *
gles2rice     --> mupen64plus-video-rice
input-android --> mupen64plus-input-android *
rsp-hle       --> mupen64plus-rsp-hle

* Note that gles2n64 and input-android don't exist in the mupen64plus
organization. We will be adding them to the mupen64plus-ae organization
later.  In principle, we could one day transfer ownership to upstream,
but they're pretty rough or only apply to android, so we'll take care
of them for now.

This commit only changes the directory names, not the names of the
compiled libraries.  That will be a separate commit.
libs: Rename all native modules to match upstream names.
audio-sdl: Rename macro PAULSCODE -> ANDROID_EDITION.
ui-console: Rename macro PAULSCODE -> ANDROID_EDITION.
glide: Rename macro PAULSCODE -> ANDROID_EDITION.
rice: Rename macro PAULSCODE -> ANDROID_EDITION.
core/r4300: Surround Perfect Dark hack with ANDROID_EDITION guard.
doc: Fix URLs in javadoc.

URLs in the translated resources will be done later.
cleanup: Rename gles2n64 --> gln64 in comments and variables.

Changes to the resources (translations, keys) will be done later.
cleanup: Rename gles2glide64 --> glide64 in comments and variables.

Changes to the resources (translations, keys) will be done later.
cleanup: Rename gles2rice --> rice in comments and variables.

Changes to the resources (translations, keys) will be done later.
res: Updated translations.
res/assets: Change keynames gles2n64 --> gln64.
res/assets: Change keynames gles2glide64 --> glide64.
res/assets: Change keynames gles2rice --> rice.
res: Remove two unused strings.
doc: Fix github URLs.
doc: Remove linefeeds in two translations of the google play listing.

The number of linefeeds need to match in plaintext files, otherwise the
transifex tool barfs.