announce: feedback from Mouq++ and raydiak++

also linkify PairMap

docs/announce/2015.03.md

@@ -30,11 +30,11 @@ Some of the new compiler features added to this release include:
   2015.02 release notes](https://github.com/rakudo/rakudo/blob/nom/docs/announce/2015.03.md) for the full list
 + Allow `Buf.AT-POS` to return an l-value.
 + Implement `method ^foo($) { ... }` syntax.
-+ Implemented `PairMap` (the simple case only, for now).
++ Implemented [PairMap](http://doc.perl6.org/type/PairMap) (the simple case only, for now).
 + Implemented `.antipairs` (pairs with value => key).
 + Implemented `.pairup` for creating pairs from lists.
 + Implemented `LEXICAL`, `OUTERS` and `CALLERS` pseudo-packages
-+ Add a `array[T]`, usable for native `int`/`num` (MoarVM only for now)
++ Add `array[T]`, usable for native `int`/`num` (MoarVM only for now)
 + Other native improvements, e.g. `my int $a; $a++`
 + Implement `IO::Path.resolve` on r-m/POSIX
 
@@ -52,7 +52,7 @@ handle appropriately, although they will appear in upcoming releases.
 Some of the not-quite-there features include:
 
   * advanced macros
-  * threads and concurrency (in progress for the JVM and MoarVM backend)
+  * threads and concurrency (in progress)
   * Unicode strings at levels other than codepoints
   * interactive readline that understands Unicode
   * non-blocking I/O (in progress)