Ensure Gradle download works for SlateKit.Common

[kishorereddy]

This works.

1. Checked download from maven of slatekit.common in small hello world project
2. Setup page on www.slatekit.com is now updated. http://www.slatekit.com/kotlin-setup.html
3. Setup page now emphasizes gradle as primary setup option
4. Note, the maven url must be setup.

repositories {
    mavenCentral()
    maven {
        url  "http://dl.bintray.com/codehelixinc/slatekit"
    }
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
	
    // Reference the slate kit binaries here
    compile 'com.slatekit:slatekit-common:0.9.9'
    compile 'com.slatekit:slatekit-meta:0.9.9'
}