DGS http API, not yet finished
Merged 'develop'.
Merged 'develop'.
fixed ugly forking bug
more DGS API
DGS API
Merged 'develop'.

Conflicts:
	src/java/nxt/Nxt.java
Merged 'develop'.
DGS API - goods sorted by name, purchases by timestamp
Merged 'develop'.
use bouncycastle AES
added Crypto.getPrivateKey() and curve()
DGS now uses AES; finished DGS API; added Account.encryptTo and Account.decryptFrom; added DGS event listeners
length limits enforced after encryption only
also accept pre-encrypted notes and goods, for client-side signing
Merged 'develop'.

Conflicts:
	src/java/nxt/crypto/Crypto.java
Merged 'develop'.

Conflicts:
	src/java/nxt/Nxt.java
	src/java/nxt/crypto/Crypto.java
DGS bugs
gzip compress before encryption
Merged 'develop'.