A few housekeeping cleanups (#1602)

* Update centre bar and meetings pages

* Add PNG versions of logos and a white text version

* Spelling correction

Author: graeme-a-stewart

_layouts/main.html

@@ -64,17 +64,23 @@ <h2>Meetings</h2>
   <div class="col-lg-4">
     <h2>HSF Seminars</h2>
     <p>
-      We are starting a series of <a
+      We have started a series of <a
       href="{{site.baseurl}}/meetings/hsf-seminars.html">HSF Seminars</a>, to cover
       topics of general interest for software in high-energy physics.
       <p style="display: block; text-align: center">
         <img src="{{ '/images/HSF-logo/hsf-logo-seminar.svg' | relative_url }}"
         alt="HSF seminar logo" style="width:40%; margin-left: auto; margin-right: auto;">
       </p>
-      In our very first seminar Uwe Acosta will introduce the discussion of <a
+      In our very first seminar Uwe Acosta introduced the discussion of <a
       href="https://indico.cern.ch/event/1452314/"><em>Julia in high-energy
-      physics: a paradigm shift or just another tool?</em></a>
+      physics: a paradigm shift or just another tool?</em></a> and then Jeff
+      Bezanson followed up with <a
+      href="https://indico.cern.ch/event/1462252/"><em>Julia as a
+      Statically-Compiled Language</em></a>.
     </p>
+    <p>Suggestions for future topics for the seminar series are very welcome -
+    just contact the <a
+    href="{{site.baseurl}}/meetings/hsf-seminars.html">organisers</a>.
   </div>
 
 

_meetings/compute-accelerator-forum.md

@@ -1,20 +1,21 @@
 ---
-title: "Compute Accelerator Forum"
+title: "Compute and Accelerator Forum"
 author: "Graeme Stewart"
 layout: plain
 ---
 
-The *Compute Accelerator Forum* is a series of meetings on topics
-related to the effective use of compute accelerators in the HEP
-field.
+The *Compute and Accelerator Forum* is a series of meetings on topics related to
+HEP computing hardware and software.
 
-The CAF is organised by SIDIS, openlab and the HSF.
+The CAF is organised by openlab and the HSF.
 
 It comprises a variety of topics, ranging from:
 
 - abstraction layer toolkits and general libraries
 - HEP software projects that use accelerators
 - particular topical issues that affect multiple projects
+- new processing architectures
+- programming language developments, from the new languages to new standards
 
 The schedule for past and future meetings is published in
 [Indico](https://indico.cern.ch/category/12741/).
@@ -27,8 +28,6 @@ sent to the
 mailing list (please subscribe!).
 
 <p align=center>
-<img src="{{ '/images/SIDIS-full-logo-2l-smhx-dark_0.png' | relative_url }}"
-  alt="SIDIS-logo" style="display: inline-block; width:25%; margin:3%">
 <img src="{{ '/images/hsf_logo_angled.png' | relative_url }}"
   alt="HSF-logo" style="display: inline-block; width:20%; margin:3%">
 <img src="{{ '/images/LOGO_CERN_openlab_0.png' | relative_url }}"

_meetings/hsf-seminars.md

@@ -16,9 +16,14 @@ eligible!
 The schedule for past and future meetings is published in
 [Indico](https://indico.cern.ch/category/18810/).
 
-You can contact the [HSF Steering Group](mailto:[email protected])
-or any of our [activity area]({{ site.baseurl }}/) coordinators to suggest or
-volunteer any topics that you would like to see in future meetings.
+## Organisers
+
+The seminar organisers are Benedikt Hegner, Michel Jouvin and Andra Valassi, or
+you can contact the [HSF Steering Group](mailto:[email protected])
+or any of our [activity area]({{ site.baseurl }}/what_are_activities.html)
+coordinators to suggest or volunteer any topics that you would like to see in
+future meetings.
+
 
 <p align=center>
 <img src="{{ '/images/HSF-logo/hsf-logo-seminar.svg' | relative_url }}"