Currently translated at 100.0% (270 of 270 strings)

Its obvious that "u16 command" is inside every packet, therefore this
commit removes all mentions of the command, if non-array like notation
is used. We already didn't add "u16 command" to new packets or removed
it at packet changes, so now we remove it from existing packets.

Use in-place locale directory if that exists, and
static one (RUN_IN_PLACE or CUSTOM_LOCALEDIR) doesn't exist.
Report to errorstream if neither static nor in-place locale
dirs exist, and report successfully found paths to infostreem.

Fixes two bugs:

-> Regression of commit [1] where if we use RUN_IN_PLACE=false,
	but don't make install, locales aren't found. One might
	think this is no regression, as its no bug, but all other
	paths (mainmenu, etc.) are detected properly.
-> Regression of commit [1] where locales don't work on windows.

References:
[1]: Commit 645e2086 "Use CUSTOM_LOCALEDIR if specified" by @ShadowNinja

Google code was shut down, project moved to github.

As indicated in its name, m_client_event_queue should be a queue.
Change std::list to std::queue to improve the queue's performance.

We require sudo right now, tell this travis, so that they don't try to
run it on their container based infrastructure.

Commit

e4bff8be - Clean up threading

by @ShadowNinja has broken the OSX build.

Including things inside a namespace isn't good.

Also fixes #3124.

-Complies with the Linux standard freedesktop icon naming specs: http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html#guidelines
-Ensures compatibility with icon themes
-Edit minetest.desktop, CMakeLists.txt and README.md to reflect this change

Before, calling get_areas_in_area for an areastore with both
include_borders and include_data would result in a lua error,
if there was at least one area as result:
attempt to index a number value in function 'get_areas_in_area'

Otherwise, this updates all .po files for all line numbers that changed
since the last time updatepo.sh was run. We still add the filename, but
this information shouldn't change too often.

xgettext beginning with 0.18.4 supports this feature.

Also remove trailing whitespaces from the file

Fixes #3125

Fixes minetest.get_player_information segfault due
to out of bounds access problems, when compiled as debug build.

The commit
8f9af573 "Add core.get_dir_list" by @ShadowNinja
has removed the implementation of the l_get_dirlist function and all its usages
from the l_mainmenu.cpp file, but hasn't removed it from the header file.

The reason why this hasn't been detected earlier is that C++ has this interesting
feature to still make it possible to create instances of classes whose never used
private methods are declared but not defined.

Preserves the rare unbroken protruding dungeons
Fix random range for first room roomplace
Fix checked volume for first room 'fits' bool
and check for 'untouchable' flag instead of 'inside'
Remove 'enable floating dungeons' setting

Fixes "double fault" / "error in error handling" messages
(issue #1423) and instead shows a complete backtrace.

  * Rename everything.
    * Strip J prefix.
    * Change UpperCamelCase functions to lowerCamelCase.
  * Remove global (!) semaphore count mutex on OSX.
  * Remove semaphore count getter (unused, unsafe, depended on internal
    API functions on Windows, and used a hack on OSX).
  * Add `Atomic<type>`.
  * Make `Thread` handle thread names.
  * Add support for C++11 multi-threading.
  * Combine pthread and win32 sources.
  * Remove `ThreadStarted` (unused, unneeded).
  * Move some includes from the headers to the sources.
  * Move all of `Event` into its header (allows inlining with no new includes).
  * Make `Event` use `Semaphore` (except on Windows).
  * Move some porting functions into `Thread`.
  * Integrate logging with `Thread`.
  * Add threading test.

Before, android versionName was set to "...13", which made the f-droid build fail.