Allow for updated SLF4J, hard code the version we want to stop "-bundle-slf4j" failing and producing useless jars

Update jgit-describe so that we can, well, describe

Change-Id: I0d440c63e55fd9922f89483d452887eebf9cb1d8
Reviewed-on: http://gerrit.dmdirc.com/2515
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

build.xml

 
     <target name="-bundle-slf4j">
         <jar destfile="${dist.jar}" update="true">
-            <zipfileset src="lib/slf4j-api-1.6.4.jar" includes="org/slf4j/**/*"/>
+            <zipfileset src="lib/slf4j-api-1.6.6.jar" includes="org/slf4j/**/*"/>
         </jar>
     </target>
 

ivy.xml

     <dependencies>
         <dependency org="ant-contrib" name="ant-contrib" rev="1.0b3" conf="build->default" />
         <dependency org="org.sourceforce.ant-nsis" name="ant-nsis" rev="1.3" conf="build->default" />
-        <dependency org="com.github.shanemcc" name="jgit-describe" rev="0.2" conf="build->default" />
+        <dependency org="com.github.shanemcc" name="jgit-describe" rev="0.3.1" conf="build->default" />
         <dependency org="net.sourceforge.fikin-ant-tasks" name="ant-fikin" rev="1.7.3" conf="build->default" />
 
-        <dependency org="org.slf4j" name="slf4j-api" rev="1.6.+" conf="compile->default" />
+        <dependency org="org.slf4j" name="slf4j-api" rev="1.6.6" conf="compile->default" />
         <dependency org="ch.qos.logback" name="logback-classic" rev="1.+" conf="test->default" />
 
         <dependency org="com.github.peichhorn" name="lombok-pg" rev="latest.release" conf="compile->default" />