Remove links for BIP 40 and 41

BIP 40 and 41 have no associated document (not on the Wiki either)
so remove the broken links.
We may want to remove these completely, eventually...
Add BIP 0038
Replace request= with shorter, QR-friendlier, r=

Consensus from bitcoin-development mailing list discussion.
Update BIP-0001 for github move

- Mention github instead of wiki
- Add markdown as allowed format
- Fix some weirdnesses such as "A BIP editor must subscribe to the
  gmaxwell@gmail.com list.". Remove the repetition and create a new
  section which lists the BIP editors (currently only gmaxwell).
- Prefer discussion on mailing list to forum
Adding link to Ruby implementation

I had added this link on the wiki, but when the page got moved over to GitHub, the link disappeared.
Merge pull request #2 from wink/patch-1

Adding link to Ruby implementation of BIP0032
Merge pull request #1 from laanwj/master

Update BIP-0001 for github move
update to latest BIP-0039 draft
Merge pull request #3 from trezor/master

update to latest BIP-0039 draft
Extend description of the partial merkle block format
Update bip-0013.mediawiki

Clarified that the 4-byte checksum is from double SHA256 rounds
PBKDF2 uses 2048 rounds
Adding link to Go implementation
Merge pull request #8 from WeMeetAgain/patch-1

Adding link to Go implementation of BIP0032
Link to Sarchar's JavaScript BIP32 implementation.
Merge pull request #7 from sarchar/master

Link to Sarchar's JavaScript BIP32 implementation.
Merge pull request #6 from discretepackets/patch-1

Update bip-0013.mediawiki
Add Type field to table in README

I thought it would be nice to enable people browsing BIPs to be able to
tell at a glance which ones are standards track and which are
informational.
Merge pull request #9 from elidourado/master

Add Type field to table in README
Restructured, fixed some grammar/spelling errors.