Update to native-lib-loader version 2.0.1

This version has been deployed to OSS Sonatype, and is hence available
on Maven Central. It is also a release version, which is very important
since snapshot version couplings can cause dependencies to change "out
from under" a component, resulting in irreproducible builds. Especially
for releases, we do not want any snapshot dependency couplings
(the most recent Bio-Formats 5.0.1 release POM still somehow declares a
dependency on native-lib-loader 2.0-SNAPSHOT).
Merge pull request #1104 from ctrueden/dev50/native-lib-loader-snapshot

Update native-lib-loader to 2.0.1 release