Optimize Images 610.60kb -> 448.30kb (26.58%) and fix typo (#252)

covered by: alpay_yildirim.dco

* [ImgBot] Optimize images

*Total -- 610.60kb -> 448.30kb (26.58%)

/obevo-site/src/site/resources/images/merge-pre-view.png -- 138.97kb -> 71.91kb (48.26%)
/obevo-site/src/site/resources/images/merge-post-view.png -- 71.80kb -> 40.14kb (44.1%)
/obevo-site/src/site/resources/images/reverse-engineer-aqua.jpg -- 119.66kb -> 98.49kb (17.69%)
/obevo-site/src/site/resources/images/dependency-graph.jpg -- 54.90kb -> 45.78kb (16.62%)
/obevo-site/src/site/resources/images/algo-overview.jpg -- 66.51kb -> 56.33kb (15.32%)
/obevo-site/src/site/resources/images/hsqlAquaSetting.jpg -- 134.54kb -> 114.57kb (14.85%)
/obevo-site/src/site/resources/images/db-kata-file-setup.jpg -- 24.22kb -> 21.09kb (12.91%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

CHANGELOG.md

@@ -13,6 +13,7 @@ Allowing valid special characters (e.g. #) to be in object names, as certain RDB
 
 ### Technical Improvements
 DB2 build updated to use the new Docker Hub coordinates from IBM
+#252: Optimize Images 610.60kb -> 448.30kb (26.58%) and fix typo
 
 ### Bug Fixes
 #229: Oracle Reverse Engineering can still generate output even if a single object DDL cannot be generated.

CONTRIBUTING.md

@@ -66,7 +66,7 @@ Fork the repository in GitHub and make changes in your fork.
 
 Please add a description of your changes to the [Change Log](CHANGELOG.md).
 
-Before you submit your first pull request, please first submit a DCO, per the instructions in the last seciton on this page.
+Before you submit your first pull request, please first submit a DCO, per the instructions in the last section on this page.
 
 Finally, submit a pull request. In your pull requests:
 * Make sure you [rebase your fork](https://github.com/edx/edx-platform/wiki/How-to-Rebase-a-Pull-Request) so that pull requests can be fast-forward merges.

dco/alpay_yildirim.dco

@@ -0,0 +1,9 @@
+1) I, Alpay Yildirim, certify that all work committed with the commit message
+"covered by: alpay_yildirim.dco" is my original work and I own the copyright
+to this work. I agree to contribute this code under the Apache 2.0 license.
+
+2) I understand and agree all contribution including all personal
+information I submit with it is maintained indefinitely and may be
+redistributed consistent with the open source license(s) involved.
+
+This certification is effective for all code contributed from 2019-08-22 to 9999-01-01.