Move Japanese pictures to a subdir

diff --git a/img/ja/section3-try-it-out.png b/img/ja/screenshots/section3-try-it-out.png
similarity index 100%
rename from img/ja/section3-try-it-out.png
rename to img/ja/screenshots/section3-try-it-out.png

diff --git a/img/ja/section4-web-of-trust.png b/img/ja/screenshots/section4-web-of-trust.png
similarity index 100%
rename from img/ja/section4-web-of-trust.png
rename to img/ja/screenshots/section4-web-of-trust.png

diff --git a/img/ja/section5-01-use-it-well.png b/img/ja/screenshots/section5-01-use-it-well.png
similarity index 100%
rename from img/ja/section5-01-use-it-well.png
rename to img/ja/screenshots/section5-01-use-it-well.png

diff --git a/img/ja/section5-02-use-it-well.png b/img/ja/screenshots/section5-02-use-it-well.png
similarity index 100%
rename from img/ja/section5-02-use-it-well.png
rename to img/ja/screenshots/section5-02-use-it-well.png

diff --git a/img/ja/section6-next-steps.png b/img/ja/screenshots/section6-next-steps.png
similarity index 100%
rename from img/ja/section6-next-steps.png
rename to img/ja/screenshots/section6-next-steps.png

diff --git a/img/ja/step1a-install-wizard.png b/img/ja/screenshots/step1a-install-wizard.png
similarity index 100%
rename from img/ja/step1a-install-wizard.png
rename to img/ja/screenshots/step1a-install-wizard.png

diff --git a/img/ja/step1b-01-tools-addons.png b/img/ja/screenshots/step1b-01-tools-addons.png
similarity index 100%
rename from img/ja/step1b-01-tools-addons.png
rename to img/ja/screenshots/step1b-01-tools-addons.png

diff --git a/img/ja/step1b-02-search.png b/img/ja/screenshots/step1b-02-search.png
similarity index 100%
rename from img/ja/step1b-02-search.png
rename to img/ja/screenshots/step1b-02-search.png

diff --git a/img/ja/step1b-03-install.png b/img/ja/screenshots/step1b-03-install.png
similarity index 100%
rename from img/ja/step1b-03-install.png
rename to img/ja/screenshots/step1b-03-install.png

diff --git a/img/ja/step2a-01-make-keypair.png b/img/ja/screenshots/step2a-01-make-keypair.png
similarity index 100%
rename from img/ja/step2a-01-make-keypair.png
rename to img/ja/screenshots/step2a-01-make-keypair.png