Fix classpaths after asm and bcel updates, fixes #405

[iloveeclipse]

@richardfearn : can you please check this PR?

[KengoTODA]

@iloveeclipse I proposed one fix to generate list of jar files automatically. Here is generated spotbugs/build/libs/META-INF/MANIFEST.MF:

Manifest-Version: 1.0
Main-Class: edu.umd.cs.findbugs.LaunchAppropriateUI
Bundle-Version: 3.1.0-SNAPSHOT
Class-Path: asm-analysis-6.0.jar asm-commons-6.0.jar asm-xml-6.0.jar a
 sm-util-6.0.jar asm-tree-6.0.jar asm-6.0.jar bcel-6.1.jar jcip-annota
 tions-1.0.jar dom4j-1.6.1.jar jaxen-1.1.6.jar commons-lang-2.6.jar jF
 ormatString-3.0.0.jar spotbugs-annotations.jar xml-apis-1.0.b2.jar js
 r305-3.0.1.jar
Automatic-Module-Name: com.github.spotbugs.spotbugs

This change adds two more jar files: xml-apis-1.0.b2.jar and jcip-annotations-1.0.jar which is also distributed by SpotBugs.

[iloveeclipse]

OK.

[iloveeclipse]

@KengoTODA : can we merge this now?

[KengoTODA]

LGTM