Modify examples to be dedicated crates

[farcaller]

As a followup to #330, we need to refactor all the examples to be dedicated crates. This also shows how hard zinc is to use for external users. I'd expect a zinc app to be just one more crate. It is unreasonable to expect the users to download zinc source and add a new "example" entry.

• blink in LPC11xx experimental branch #318
• blink_k20
• blink_k20_isr
• blink_lpc17xx
• blink_pt
• blink_stm32f4
• blink_stm32l1
• blink_tiva_c
• bluenrg_stm32l1
• dht22
• empty
• lcd_tiva_c
• uart
• uart_tiva_c
• usart_stm32l1

[mcoffin]

Do the concepts from posborne/zinc-example-lpc17xx and the wiki not work anymore?

[farcaller]

they do. The bundled examples are broken though.

[mcoffin]

It is unreasonable to expect the users to download zinc source and add a new "example" entry.

Ah I was just confused by this sentence.

[farcaller]

Right. I forgot about that wiki page when I was writing it.

[farcaller]

Landed all in #318.