Update metadata-extractor dependency to version 2.6.2
Updated Maven build configuration

* Use separate artifactId values for the Saxon 9.4 and Saxon 9.5 releases
* Specify source file encoding as UTF-8
* Updated issueManagement and scm sections
* Support verifying release builds against Java 6, even when building using the JDK 7 compiler
* Use recommended parent POM for Sonatype OSS releases
* Update optional dependencies, and exclude optional functionality in cases where the dependencies are not publicly available
Merge branch 'maven-updates-saxon94' of https://github.com/sharwell/xmlcalabash1 into sharwell-maven-updates-saxon94
Fix issue #121 by making sure the last captured exception is thrown after we run out of schemes
Discard control characters in property values
Turn control characters into backslash-u escapes
Fix issue #120 by making sure the default parameter input port is used by default