made ndef_buffer available to public

this is good for saving ram (i.e. when you want to read from a stream directly into the buffer)

Signed-off-by: Armin Wieser <armin.wieser@gmail.com>
Merge branch 'master' of github.com:Seeed-Studio/PN532
we need no debug

Signed-off-by: Armin Wieser <armin.wieser@gmail.com>
fixed false length in getContent()

Signed-off-by: Armin Wieser <armin.wieser@gmail.com>
Merge branch 'master' of github.com:Seeed-Studio/PN532
reenabled debug for pullrequest

Signed-off-by: Armin Wieser <armin.wieser@gmail.com>
Merge pull request #10 from awieser/pullreq

fixed length of getContent(), and added some functions