This also changes the chain export format so there is no
enclosing list around the blocks, which enables streaming export.

Über-convenience.

All other pointer types can handle nil just fine.

Frontier console node admin interface

Conflicts:
	common/types.go

641ebaa Merge branch 'develop' of https://github.com/ethereum/tests into develop
8e44fd4 possibility to launch more than one machine
5498fd5 2 more python fails
99268f3 update random test simulation files
170485e Merge remote-tracking branch 'origin/develop' into develop
4fcdf8f new python fails
e67b68a Merge branch 'develop' of https://github.com/ethereum/tests into develop
3f45f18 BlockRLPTests block fields prefixed with 0000
9fa9bbd Merge pull request #78 from wanderer/develop
222c2b4 update block tests
9d844dd python fails
05233a4 update blockchaintests
7dc0aa2 update JS_API_Test blockchain
6daf1cc added JS_API_test blockchain
e878f7e consitant address format
0e246ce python fail
57ea9a0 random failures
95934e0 add test for callcode to 0
13b8cd2 new python failures
9e60453 remove empty tests
ca6dfa9 uncle older than 6 generation test
cf7e950 some random failures
282090e update gas limits + uncle generation test
bb4c1f4 cppjit failure
cda9d4c more random failures
31ac17a add calldataload big offset test
f6b8e28 remove seedhash and update blockchain tests
ad69f9d add addmod test in order toc check that nothing get downcasted inbetween
38b7db2 a failing test
b9149b5 Merge remote-tracking branch 'origin/develop' into develop
5bea708 more failing tests
478a07d fix missing comma
6d82797 Merge remote-tracking branch 'origin/develop' into develop
2f380e2 random fails
3cd0ce7 Merge pull request #75 from romanman/develop
afa0a43 Update crypto.json
1b9b7b8 Introduce ECIES crypto test

git-subtree-dir: tests/files
git-subtree-split: 641ebaa3cf257c08838c707bebb481d61e708f95