djutils-base v2.4.2

The following issues have been resolved in this release:

• Issue #29. Add getResourceAsUri method to URLResource
• Issue #30. Add getResourceAsPath method to URLResource
• Issue #31. Check /resources folder in URLResource
• Issue #32. Remove Serializable as an all-class implementation
• Issue #33. Failure of ClassFileDescriptorTest on Ubuntu
• Issue #34. Rename URLResource to ResourceResolver and expand

Two big changes are:

• Serializable has been removed from most classes
• ResourceResolver replaces URLResource