Add some internal and useful documentation

git-svn-id: https://yubikey-personalization.googlecode.com/svn/trunk@3 b62f149e-849f-11dd-9899-c7ba65f7c4c7

diff --git a/docs/0README b/docs/0README
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+This is a directory with all kinds of developer documentation, not
+really meant for a release, but still good to know.  They should
+eventually go into a documentation repository, but for now...

diff --git a/docs/quirks-and-workarounds.txt b/docs/quirks-and-workarounds.txt
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+It seems like the Linux kernel takes exclusive ownership over the
+Yubikey, making it difficult for our programs to talk with it.
+There's a workaround, though, to set a quirks mode for the key, as
+follows:
+
+  rmmod usbhid && modprobe usbhid quirks=0x1050:0x0010:0x04
+
+In that mode, though, the Yubikey will not work as a keyboard and
+therefore not generate any string at all, so to have it work as usual
+again, you'll have to take usbhid out of quirks more:
+
+  rmmod usbhid && modprobe usbhid