Release 0.9.4

Almost fully functional release with over-the-air (OTA) reflashing of the esp, and port 23 transparent bridge as well as AVR & ARM flashing support. Simple debug log page to view the esp-link's own os_printf output via the web and a console page to see the attached uC's output.

Changes since v0.9.3: added defines in the Makefile to change GPIO pin assignments, fixed buffer overrun bug in uC console page.

To install on your esp8266 module see the project README.
The short version for the serial install is:

• flash boot_v1.4(b1).bin from the official esp_iot_sdk_v1.1.0 and included in the release tgz to 0x00000
• flash blank.bin from the official SDK and also included here to 0x7e000
• flash user1.bin to 0x01000

The short version for an OTA upgrade is:

• ./wiflash <esp-hostname> user1.bin user2.bin