1.11.0 - Coffeescript

releaseHeader('2016-09-24', '1.11.0', '1.10.0')

CoffeeScript now supports ES2015 import and export syntax.
Added the -M, --inline-map flag to the compiler, allowing you embed the source map directly into the output JavaScript, rather than as a separate file.
A bunch of fixes for yield:
- yield return can no longer mistakenly be used as an expression.
- yield now mirrors return in that it can be used stand-alone as well as with expressions. Where you previously wrote yield undefined, you may now write simply yield. However, this means also inheriting the same syntax limitations that return has, so these examples no longer compile:
```
doubles = ->
  yield for i in [1..3]
    i * 2
six = ->
  yield
    2 * 3
```
- The JavaScript output is a bit nicer, with unnecessary parentheses and spaces, double indentation and double semicolons around yield no longer present.
&&=, ||=, and= and or= no longer accidentally allow a space before the equals sign.
Improved several error messages.
Just like undefined compiles to void 0, NaN now compiles into 0/0 and Infinity into 2e308.
Bugfix for renamed destructured parameters with defaults. ({a: b = 1}) -> no longer crashes the compiler.
Improved the internal representation of a CoffeeScript program. This is only noticeable to tools that use CoffeeScript.tokens or CoffeeScript.nodes. Such tools need to update to take account for changed or added tokens and nodes.
Several minor bug fixes, including:
- The caught error in catch blocks is no longer declared unnecessarily, and no longer mistakenly named undefined for catch-less try blocks.
- Unassignable parameter destructuring no longer crashes the compiler.
- Source maps are now used correctly for errors thrown from .coffee.md files.
- coffee -e 'throw null' no longer crashes.
- The REPL no longer crashes when using .exit to exit it.
- Invalid JavaScript is no longer output when lots of for loops are used in the same scope.
- A unicode issue when using stdin with the CLI.