Add jekyll-target-blank plugin to open links in new tabs (#155)

- Add gem to Gemfile
- Add plugin to jekyll
- Fix up broken links in a few posts

Gemfile

@@ -15,3 +15,5 @@ gem 'jekyll-seo-tag', "~> 2.6.1"
 group :jekyll_plugins do
   gem 'jekyll-diagrams'
 end
+
+gem "jekyll-target-blank", "~> 2.0"

Gemfile.lock

@@ -36,6 +36,9 @@ GEM
       sass (~> 3.4)
     jekyll-seo-tag (2.6.1)
       jekyll (>= 3.3, < 5.0)
+    jekyll-target-blank (2.0.0)
+      jekyll (>= 3.0, < 5.0)
+      nokogiri (~> 1.10)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
     kramdown (1.17.0)
@@ -45,6 +48,9 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
+    mini_portile2 (2.4.0)
+    nokogiri (1.10.10)
+      mini_portile2 (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (3.0.3)
@@ -69,6 +75,7 @@ DEPENDENCIES
   jekyll-feed (~> 0.12.1)
   jekyll-paginate (~> 1.1)
   jekyll-seo-tag (~> 2.6.1)
+  jekyll-target-blank (~> 2.0)
 
 BUNDLED WITH
    2.1.4

_config.yml

@@ -38,6 +38,11 @@ plugins:
   - jekyll-paginate
   - jekyll-seo-tag
   - jekyll-diagrams
+  - jekyll-target-blank
+
+target-blank:
+   noopener: false
+   noreferrer: false
 
 tag_page: '/tags/'
 category_page: '/categories/'

_posts/2019-09-17-continuous-integration-for-firmware.md

@@ -562,7 +562,7 @@ all about it in the comments, or at
 
 [^1]: For example, see [this post](http://www.cyrilfougeray.com/2020/10/03/firmware-qa-ci-cd.html) by an Equisense team member.
 [^2]: [Circle CI](https://circleci.com)
-[^3]: [Circle CI Documentation - Jobs, Steps, Workflows]((https://circleci.com/docs/2.0/jobs-steps/#section=getting-started).)
+[^3]: [Circle CI Documentation - Jobs, Steps, Workflows](https://circleci.com/docs/2.0/jobs-steps/#section=getting-started)
 [^4]: [Checkout Step - CircleCI](https://circleci.com/docs/2.0/configuration-reference/#checkout)
 [^5]: [Storing Build Artifacts - CircleCI](https://circleci.com/docs/2.0/artifacts/)
 [^6]: [CircleCI's command-line application](https://github.com/CircleCI-Public/circleci-cli)

_posts/2020-10-06-separating-unique-parameters.md

@@ -235,8 +235,8 @@ was a good idea to also generate the more easily readable version of the file.
 ```
 
 > The shell script in this section lets TTN come up with a DevEUI for
-> simplicity. Check out [this link](https://www.
-> thethingsnetwork.org/forum/t/deveui-for-non-hardware-assigned-values/2093/23)
+> simplicity. Check out
+> [this link](https://www.thethingsnetwork.org/forum/t/deveui-for-non-hardware-assigned-values/2093/23)
 > to see why you should not do that in production.
 
 ## Programming a Device