sky.cpp: m_bgcolor.getAlpha() was being used before initialised

mesh related: m_highlight_mesh_color was being used uninitialised

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Fix android build using hardcoded path for data instead of using the one fetched by android api on init.
Fix android missing version information

Fixes: http://i.imgur.com/arAWw1i.png (middle-right)

Broken by 6bc4cad0, e.g.
  minetest --worldname world
would be parsed as
  minetest --worldname --worldname

Broken by 6bc4cad0 because database-redis.h
depended on settings.h to include filesys.h.

Changes:
  * Indentation with tabs by default.
  * Array keys dumped without "[i] = " prefix.
  * String keys that are valid identifiers aren't enclosed in '[""]'.
  * Basic support for multiple references (as specified in the comment).

Caused by a020d1b6.

This reverts commit 7993696f, which broke the
icon on most distributions.

This also cleans up settings a bit