Fix typo tab(タブ) -> tag(タグ)
Merge pull request #45 from shin1ohno/typo_fix

Fix typo tab(タブ) -> tag(タグ) in Japanese translation
small fixes in Spanish version.
Merge pull request #46 from amatellanes/gh-pages

Small fixes in Spanish version
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages