Show a user friendly message for UnsupportedClassVersionError

[chilicat]

Caused by: java.lang.UnsupportedClassVersionError: com/avid/central/interplaymam/mamlocationsui/api/ContentProvider : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.felix.scrplugin.helper.ClassScanner.scanSources(ClassScanner.java:144)
    at org.apache.felix.scrplugin.SCRDescriptorGenerator.execute(SCRDescriptorGenerator.java:146)
    at net.chilicat.felixscr.intellij.build.scr.AbstractScrProcessor.execute(AbstractScrProcessor.java:77)
    at net.chilicat.felixscr.intellij.build.ScrProcessingItem.execute(ScrProcessingItem.java:48)
    at net.chilicat.felixscr.intellij.build.ScrCompiler.process(ScrCompiler.java:108)
    at com.intellij.compiler.impl.FileProcessingCompilerAdapter.process(FileProcessingCompilerAdapter.java:46)
    at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:2229)
    at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:1577)
    at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:1082)
    at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:799)
    ... 16 more