Fix outdated package name String

[vaughandroid]

For me this fixes the issues which seem to have arisen for Android users with versions 1.3 and 1.4.
#20 & various comments on other issues

Thanks to the wonders of jitpack.io you can try this out by adding this to your build script:

repositories {
    maven { url "https://jitpack.io" }
}

dependencies {
    androidTestCompile 'com.github.vaughandroid:dexmaker:v1.5-SNAPSHOT'
}

[ened]

@dshirley please merge

[vaughandroid]

Per the comments in #20, this isn't needed. Including the dexmaker-dx dependency should fix the issues that this was addressing.