Merge pull request #98 from pp-mo/linkcheck

Refine exclusions from github.com.

Author: pp-mo

.lycheeignore

@@ -4,7 +4,7 @@ https://doi.org/10.3390/jmse2010194
 https://effbot.org
 https://ibm-design-language.eu-de.mybluemix.net/design/language/resources/color-library
 https://geoport.whoi.edu/thredds/dodsC/bathy/gom15
-https://github.com
+https://github.com/[^/]*$
 https://scitools.github.com/cartopy
 https://stickler-ci.com
 https://www.flaticon.com