Added french version of Scala
Updated french version of scala
Corrections after pull request of the french translation of Scala
Updated links and fix typo
Removing comparison with java performance for while loops
Fixed missing + sign in lambda section
Merge pull request #656 from tormaroe/patch-1

Fixed missing + sign in lambda section
Should have more detail about named return values.

There was not a section about named return values, and it feels like it is a valuable and important enough thing to learn early on. If nothing else, when looking at someone else's code this may be a point of confusion.
Fixed `on` to `in` in comment.
Slight language change per pull req. comment
Hopefully slight language improvement over orig.
Merge pull request #657 from szaydel/master

Golang - lack of information about named return values in functions
Fix spelling and other small issues
Merge pull request #659 from nixw/spelling_fix

[C] Fix spelling and other small issues
Learn function decorators with Go

Added snippet about using closures as function decorators in Go. Also
removed a few extra whitespaces.
Merge pull request #660 from szaydel/master

Learn function decorators with Go
[rust/en] Add an English Rust tutorial

Fixes #480.
add &str explanation; add section on vectors
Merge pull request #661 from P1start/rust

[rust/en] Add an English Rust tutorial
fix(go func factory): fix func factory example

previous code did not run because outside main() code was done