Align logo, edit PR template (#6272)

* Align badges and logo in README
* Comment out sections in PR template so they are only visible when creating a PR.
* fix typos in README

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,7 +1,8 @@
-Thank you for submitting a contribution to Apache Geode.
+<!-- Thank you for submitting a contribution to Apache Geode. -->
 
-In order to streamline the review of the contribution we ask you
-to ensure the following steps have been taken:
+<!-- In order to streamline the review of the contribution we ask you
+to ensure the following steps have been taken: 
+-->
 
 ### For all changes:
 - [ ] Is there a JIRA ticket associated with this PR? Is it referenced in the commit message?
@@ -16,7 +17,8 @@ to ensure the following steps have been taken:
 
 - [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under [ASF 2.0](http://www.apache.org/legal/resolved.html#category-a)?
 
-### Note:
+<!-- Note:
 Please ensure that once the PR is submitted, check Concourse for build issues and
 submit an update to your PR as soon as possible. If you need help, please send an
 email to [email protected].
+-->

BUILDING.md

@@ -103,5 +103,5 @@ The following steps have been tested with **IntelliJ IDEA 2020.3.3**
    Some optional sanity tests to make sure things are working properly:
     * Try looking up classes using **Navigate -> Class...**
     * Open and run a distributed test such as BasicDistributedTest in geode-core.
-    * Create a new java class and ensure the Apache license is automatically added to the top of the
+    * Create a new Java class and ensure the Apache license is automatically added to the top of the
       file with no blank line before the package line.

README.md

@@ -1,7 +1,11 @@
-[<img src="https://geode.apache.org/img/Apache_Geode_logo.png" align="center"/>](http://geode.apache.org)
+<div align="center">
+
+[![Apache Geode logo](https://geode.apache.org/img/Apache_Geode_logo.png)](http://geode.apache.org)
 
 [![Build Status](https://concourse.apachegeode-ci.info/api/v1/teams/main/pipelines/apache-develop-main/badge)](https://concourse.apachegeode-ci.info/teams/main/pipelines/apache-develop-main) [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://www.apache.org/licenses/LICENSE-2.0) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.apache.geode/geode-core/badge.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.geode%22) [![homebrew](https://img.shields.io/homebrew/v/apache-geode.svg)](https://formulae.brew.sh/formula/apache-geode) [![Docker Pulls](https://img.shields.io/docker/pulls/apachegeode/geode.svg)](https://hub.docker.com/r/apachegeode/geode/) [![Total alerts](https://img.shields.io/lgtm/alerts/g/apache/geode.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/apache/geode/alerts/) [![Language grade: Java](https://img.shields.io/lgtm/grade/java/g/apache/geode.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/apache/geode/context:java) [![Language grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/apache/geode.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/apache/geode/context:javascript) [![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/apache/geode.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/apache/geode/context:python)
 
+</div>
+
 ## Contents
 1. [Overview](#overview)
 2. [How to Get Apache Geode](#obtaining)
@@ -11,8 +15,8 @@
 6. [Application Development](#development)
 7. [Documentation](https://geode.apache.org/docs/)
 8. [Wiki](https://cwiki.apache.org/confluence/display/GEODE/Index)
-9. [How to Contribute?](https://cwiki.apache.org/confluence/display/GEODE/How+to+Contribute)
-10. [Export Control](#export)
+9. [How to Contribute](https://cwiki.apache.org/confluence/display/GEODE/How+to+Contribute)
+10.[Export Control](#export)
 
 ## <a name="overview"></a>Overview
 
@@ -40,7 +44,7 @@ latency and 24x7 availability requirements.
 You can download Apache Geode from the
 [website](https://geode.apache.org/releases/), run a Docker
 [image](https://hub.docker.com/r/apachegeode/geode/), or install with
-[homebrew](https://formulae.brew.sh/formula/apache-geode) on OSX. Application developers
+[Homebrew](https://formulae.brew.sh/formula/apache-geode) on OSX. Application developers
 can load dependencies from [Maven
 Central](https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.geode%22).