add a page describing TeleBT

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+# TeleBT
+
+TeleBT provides the equivalent of a [TeleDongle](../TeleDongle), with
+the addition of [Bluetooth](http://www.bluetooth.com) as an alternative to
+USB for connection to the ground station computer.
+
+The RF filter components are set for use in the vicinity of 435 Mhz.
+
+For the latest TeleBT firmware and related software, please
+visit the [AltOS](../AltOS) page on this site.
+
+## Features ##
+
+### User View ###
+
+* 70cm ham-band transceiver compatible with [Altus Metrum](../) products,
+  programmed for 38k4 GFSK data rate with forward error correction
+* micro USB interface
+* 4 pin Tyco MicroMaTch connector for debug and flash programming
+* 8 pin Tyco MicroMaTch connector supports serial or SPI interface
+* 900mAh LiPo battery charged via USB 
+
+### Developer View ###
+
+* [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
+       * Sub-1Ghz transceiver
+       * 8051 MCU
+       * 32k Flash
+       * 4k RAM
+       * USB 2.0
+       * 6 12-bit analog inputs (11 bits with single-ended sensors)
+       * 2 channels of serial I/O
+       * digital I/O
+       * interfaced to Arduino via async serial plus two handshake pins
+* Raycom Bluetooth module interfaced to the CC1111 via async serial
+* 150mA 3.3V LDO regulator
+       * input and output appear on 8-pin companion connector
+* Software Features
+       * Written mostly in C with some 8051 assembler
+       * Runs from on-chip flash, uses on-chip RAM
+       * USB serial emulation for data interface
+* Tools Used
+       * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
+       * [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
+* Licenses
+       * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
+       * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
+
+## Artifacts ##
+
+There is a single manual for all Altus Metrum products,
+which is available in [html](../AltOS/doc/altusmetrum.html) and 
+[pdf](../AltOS/doc/altusmetrum.pdf) formats.
+
+The hardware design current gEDA files are available from 
+[git.gag.com](http://git.gag.com) in the project 
+[hw/teleshield](http://git.gag.com/?p=hw/telebt;a=summary).  
+
+## Future Plans ##
+
+Two prototype versions have been built with different physical form factors,
+v0.2 could be put into production at any time.