README: add to limitations section
classes consisting of static methods should not offer public constructor
pom: add name as per "Sonatype OSS Maven Repository Usage"

see also:
https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide#SonatypeOSSMavenRepositoryUsageGuide-5.Prerequisites
pom: remove link to project page form description

(project/url already provides this)