Fixed basic whitespace problems.

Indenting by spaces and alignment by spaces, as well as trailing whitespace on non-empty lines.
Fixed spaces around single-line comments.

There should be at least two spaces in front and one space after //-style comments.
Fix sapling drop.
Merge pull request #1204 from Howaner/Blocks

Fix sapling drop.
Normalized comments.

This was mostly done automatically and then visually inspected for obvious errors.
All //-style comments should have a 2-space separation from the code, and 1 space after the comment sign.
Initial version of a script to check basic style.

This script reports basic violations of the style, such as indentation using spaces, alignment using tabs, trailing whitespace etc. Passing this script does NOT mean that the style is clean, it's only for fast-checking purposes.
Merge branch 'master' of https://github.com/mc-server/MCServer
Basic style fixes.
Player.cpp: Added Wither death message
Player.cpp: Fixed compile error
More trailing whitespace fixes.
Fixed tabs used for alignment.
Fixed code style in Trees.cpp.

The src folder now has zero BasicStyle violations.
Fixed NULL being passed instead of a double to AddEntityEffect