fix gsoc2012/harfbuzz interlinks

Author: Dane Springmeyer

_posts/blog/2012-06-19-gsoc2012-status.md

@@ -5,7 +5,7 @@ author: Hermann Kraus
 category: Mapnik
 ---
 
-Today I would like to describe the current state of my [Summer of Code project](http://mapnik.org/news/2012/05/29/gsoc2012/):
+Today I would like to describe the current state of my [Summer of Code project](http://mapnik.org/news/gsoc2012):
 
 ## Libraries
 

_posts/blog/2012-07-02-gsoc2012-status3.md

@@ -5,7 +5,7 @@ author: Hermann Kraus
 category: Mapnik
 ---
 
-Last week I finally merged the test code for my [Summer of Code project](http://mapnik.org/news/2012/05/29/gsoc2012) into Mapnik's code. 
+Last week I finally merged the test code for my [Summer of Code project](http://mapnik.org/news/gsoc2012) into Mapnik's code. 
 
 The code currently doesn't render any output image but it already does this:
 

_posts/blog/2012-07-13-gsoc2012-status4.md

@@ -40,7 +40,7 @@ script but instead can rely on it to do the job and simply take the glyphs.
 The next major bug ([#519](https://github.com/mapnik/mapnik/issues/519)) isn't
 solved yet and is actually worse than what we have in master now because text
 runs with mixed directions are processed in the wrong order by current code.
-This will be fixed together with [line breaking](http://mapnik.org/news/2012/07/02/gsoc2012-status3)
+This will be fixed together with [line breaking](http://mapnik.org/news/gsoc2012-status3)
 as the problem is in the same area (wrong ordering of text runs).
 
 ## Next steps

_posts/blog/2012-07-22-gsoc2012-status5.md

@@ -6,7 +6,7 @@ category: Mapnik
 ---
 
 Yet an other week has passed and a lot of things have happened since my
-[Summer of Code half-time post](http://mapnik.org/news/2012/07/13/gsoc2012-status4):
+[Summer of Code half-time post](http://mapnik.org/news/gsoc2012-status4):
 
 ## Itemizer
 

_posts/blog/2012-07-31-gsoc2012-status6.md

@@ -7,7 +7,7 @@ category: Mapnik
 
 This week my code finally has reached a state where everybody interested can
 try it. After having implemented line breaking and fixing a few bugs
-[last week](http://mapnik.org/news/2012/07/22/gsoc2012-status5) I implemented
+[last week](http://mapnik.org/news/gsoc2012-status5) I implemented
 the placement finder algorithm for point placements this week.
 
 # Placement finder

_posts/blog/2012-08-04-gsoc2012-status7.md

@@ -5,7 +5,7 @@ author: Hermann Kraus
 category: Mapnik
 ---
 
-[Last week](http://mapnik.org/news/2012/07/31/gsoc2012-status6) I implemented
+[Last week](http://mapnik.org/news/gsoc2012-status6) I implemented
 point placements for the new HarfBuzz text shaping/rendering code. This week
 my goal was to implement line placements, but I started with something different:
 

_posts/blog/2012-08-13-gsoc2012-status8.md

@@ -6,7 +6,7 @@ category: Mapnik
 ---
 
 
-Building on my work from [last week](http://mapnik.org/news/2012/08/04/gsoc2012-status7)
+Building on my work from [last week](http://mapnik.org/news/gsoc2012-status7)
 I completed several smaller tasks this week. While each task on its own was not
 very big, together they have lead to a state where almost all tests pass!
 

_posts/blog/2015-07-07-release-3.0.0.md

@@ -17,7 +17,7 @@ You can [download the official source](https://mapnik.s3.amazonaws.com/dist/v3.0
 
 There are two really phenomenal new features of Mapnik 3: text shaping support and "expressions everywhere".
 
-The new text support brings world-class text layout and rendering support to Mapnik for nearly every language (formally `script`) in the world thanks to the powerful [harfbuzz library](http://www.freedesktop.org/wiki/Software/HarfBuzz/). It landed in [this pull](https://github.com/mapnik/mapnik/pull/2087) and represents the first official release that includes Herm's work [from GSOC 2013](/news/gsoc2012-status9/).
+The new text support brings world-class text layout and rendering support to Mapnik for nearly every language (formally `script`) in the world thanks to the powerful [harfbuzz library](http://www.freedesktop.org/wiki/Software/HarfBuzz/). It landed in [this pull](https://github.com/mapnik/mapnik/pull/2087) and represents the first official release that includes Herm's work [from GSOC 2013](/news/gsoc2012-status9).
 
 The "expressions everywhere" support allows all single styling properties in Mapnik to be data-driven. Previously in Mapnik 2.x only a few properties could be dynamically driven by feature attributes (like `text-name` and `marker-width`). Now every property you know in Mapnik supports expressions and expressions now also support `@variables` that can be passed at render-time.