* common/compiler: solidity compiler + tests
* rpc: eth_compilers, eth_compileSolidity + tests
* fix natspec test using keystore API, notice exp dynamically changes addr, cleanup
* resolver implements registrars and needs to create reg contract (temp)
* xeth: solidity compiler. expose getter Solc() and paths setter SetSolc(solcPath)
* ethereumApi: implement compiler related RPC calls using XEth - json struct tests
* admin: make use of XEth.SetSolc to allow runtime setting of compiler paths
* cli: command line flags solc to set custom solc bin path
* js admin api with new features debug and contractInfo modules
* wiki is the doc https://github.com/ethereum/go-ethereum/wiki/Contracts-and-Transactions
* Move go test wrapper for block tests from cmd/geth to tests
* Fix logic for when tests are valid or not, by adding correct
validations for expected valid/invalid blocks
* Change block insertion helper to work on single blocks
* Add one test case for each file in BlockTests and comment out
the tests which are currently failing
* Add Skip call in all block tests in lieu of performance fixes
around ethash cache which are needed before it will be fast enough
to start / stop the node between each test
* Add fixes to parsing and converting of fields in tx tests
* Correct logic in tx tests; validation of fields and correct
logic for when RLP decoding works/fails and when this is
expected or not
* Rename files for consistency
* Add block tests wrapper to run block tests with go test
- add resolver tests and fix resolver to pass
- statereg constructor fixed
- comments added to natspec plus docserver integration for natspec userdoc fetching