Topic/rww updates

a couple of bugs I found while integrating banana with [rww-play](https://github.com/read-write-web/rww-play)
As I understand `plantain_common_jvm` is just the unit of compilation for code that is common to scala and js ( or if we had differences between scala versions 2.10 and 2.11 what was common between those ). `plantain_jvm` is just the project that is going to be used by java virtual machine based projects such as [Play2.0](http://playframework.com/). In this case it is `plantain_jvm` that has the Sesame dependency, not the common code. 

As it happened the packages compiled, because `plantain_jvm` depends on `plantain_common_jvm` and so the correct sesame jars get pulled in. But I noticed this because when importing `plaintain_jvm` in [rww-play](https://github.com/read-write-web/rww-play) the sesame jar was not pulled in. The reason was simply that the generated pom did not contain the dependencies. With these changes it does:

```cat /Users/hjs/.ivy2/local/org.w3/plantain_jvm_2.11/0.7-SNAPSHOT/poms/plantain_jvm_2.11.pom
<?xml version='1.0' encoding='UTF-8'?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.w3</groupId>
    <artifactId>plantain_jvm_2.11</artifactId>
    <packaging>jar</packaging>
    <description>RDF framework for Scala</description>
    <version>0.7-SNAPSHOT</version>
    <licenses>
        <license>
            <name>W3C</name>
            <url>http://opensource.org/licenses/W3C</url>
            <distribution>repo</distribution>
        </license>
    </licenses>
    <name>plantain_jvm</name>
    <inceptionYear>2012</inceptionYear>
    <organization>
        <name>org.w3</name>
    </organization>
    <url>https://github.com/w3c/banana-rdf</url>
    <developers>
        <developer>
            <id>betehess</id>
            <name>Alexandre Bertails</name>
            <url>http://bertails.org/</url>
        </developer>
        <developer>
            <id>antoniogarrote</id>
            <name>Antonio Garrote</name>
            <url>https://github.com/antoniogarrote/</url>
        </developer>
        <developer>
            <id>InTheNow</id>
            <name>Alistair Johnson</name>
            <url>https://github.com/inthenow</url>
        </developer>
        <developer>
            <id>bblfish</id>
            <name>Henry Story</name>
            <url>http://bblfish.net/</url>
        </developer>
    </developers>
    <scm>
        <url>git@github.com:w3c/banana-rdf.git</url>
        <connection>scm:git:git@github.com:w3c/banana-rdf.git</connection>
    </scm>
    <dependencies>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>2.11.2</version>
        </dependency>
        <dependency>
            <groupId>org.w3</groupId>
            <artifactId>rdf_jvm_2.11</artifactId>
            <version>0.7-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.w3</groupId>
            <artifactId>plantain_common_jvm_2.11</artifactId>
            <version>0.7-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.w3</groupId>
            <artifactId>rdf-test-suite_jvm_2.11</artifactId>
            <version>0.7-SNAPSHOT</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-http-core-experimental_2.11</artifactId>
            <version>0.4</version>
        </dependency>
        <dependency>
            <groupId>org.openrdf.sesame</groupId>
            <artifactId>sesame-rio-turtle</artifactId>
            <version>2.8.0-beta1</version>
        </dependency>
    </dependencies>
</project>
```