build_bladerf.sh: fix quartus 13.0+ support

nios2-build-project does not seem to exist in 13.0 and later.
So, look for nios2-terminal instead.
Add a Troubleshooting section to hdl/README.md

A couple workarounds for the dash/bash confusion, to save folks
from having to Google.  (Maybe)
Add a Quick Start section to the README
Fix markdown formatting error
Merge pull request #35 from rtucker/nios2_build_project_workaround

build_bladerf.sh: fix quartus 13.0+ support
Merge pull request #36 from rtucker/readme_updates

README updates
cli: Add external sampling from ADC pins.

A new command for print/set for sampling being internal via the normal
RXVGA2 path or external via the differential pin header.
lib: Fixed interactive() macro.

Macro took one argument when function took two.  Fixed!
lib: [Broken] Added fpga programming routines to libusb support
[BROKEN] Stubbed out remaining routines in libusb support
[BROKEN] Added remaining fns to libusb support. (Untested)
[BROKEN] Fixed typo in bladerf_libusb.h
lib: [WIP] Heavy modification to separate out linux specific code.
lib: [WIP] Builds but functionality needs checking.

Major overhaul of driver structure has been changed to support
better library versus platform separation.
libbladeRF: Fixes #41 (incorrect pointer increment in send/read routines)

Fixes the overflow reported by tarvidsson. This overflow could occur
if the read from the driver was interrupted due to a signal.
libbladeRF: Removed extraneous fflush() from dbg_printf() macro

Par stderr(3), under NOTES: "The  stream  stderr is unbuffered."

Thanks to tnt for brining this up.
libbladeRF: [WIP] Refactored Linux driver backend now compiles.

A number of XXX's and TODO's need to be addresses, as this is
not yet functional.
linux_driver: Increased periperhal access timeout

This value was previously set to 1 ms, which is currently too
small for the required window of time (even with 3 retries) to
receive a response from the FPGA.
libbladeRF: [WIP] Further file renaming
libbladeRF: [WIP] Stubbed out calls that need to be implemented