[fdio] Move headers into lib/fdio/...

Change-Id: Ie8d74e716da913bf6e2672c4acf8cd67b4962b7f

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[utest][status] Use the MX_OK and MX_ERR_* mx_status_t names

Change-Id: Ia395c985d6d13cdad97e66d92933d13ddb75c8b8

[wip][ums] switch to iotxn

- prepend ums to every print debug
- delete old read/write/recv
- remove blocking from completion_wait
Change-Id: Id145a3bbf2aada4e16e21565745217eaf95e4bc1

[system] align license and license banners with Fuchsia

This adjusts the Magenta userspace code to match the prevailing
license in Fuchsia (three-clause BSD), using the same banner
and license text.

Change-Id: I6b6d79435c5dbaa32027888874849e4f47aaa7be

[udev][ums] add read/write/seek to usb mass storage driver

- fix errors
- can read and write blocks
- implemented seeking to seek to blocks
- trhow errors when not block aligned
- debug printing in toggleable macro
- rename constants to header and rename it
- make use of completion wait struct
- style changes

Change-Id: I1ff4e3c6f1aea7c9a8477b069bd773ae5a6c6498

Revert "[wip][ums]add read and write functionality to mass storage driver"

This reverts commit f75c661167730a44732e5d30979be8f0a196d72f.

Change-Id: Ibed9d71275f138360fc8cfeaebe5c82224f206fc

[wip][ums]add read and write functionality to mass storage driver

- can now read and write blocks
- implemented seek functionality
- throw errors when not block aligned read/write/seek
- put debug printing into toggleable macro
- renamed added more constants to header file and renamed it to "ums-hw.h"
- make use of completion wait struct to wait on io's
- other style changes

Change-Id: I36a7ad2bdcc6aa18aefd081c24b58bd516f4090b

[wip][ums] add USB mass storage driver

Change-Id: Iabf0079451124959d7091a326e4c39a25f13aec7