Aria / 508 Support

[chriswetterman]

As part of FormidableLabs/victory-chart#233 (adding aria support to charts in victory-chart),

<title id="title">{this.props.title}</title> <desc id="desc">{this.props.desc}</desc>

where the ID is hardcoded is used in many components. When multiple charts are on one page, assistants like VoiceOver read the wrong title and description for the currently focused/selected chart.