Automatically resolve latest version ?

[lloydmeta]

An idea came up to look up the latest JavaCV version on Maven Central and use that as javaCVVersion. This is possible, but should be a bit better thought out to help with the following assumptions:

1. it assumes the ability to connect to Maven Central for the query
2. should probably have a fallback to a default version if querying fails
3. assumes that the user is ok with arbitrarily using the latest version, which can cause major compilation or runtime issues