Merge pull request #211 from josephyzhou/develop

eth updates
Fixed MSVC compile errors (but missing functionality in LLL parser)
Merge pull request #212 from programmerTim/develop

Fixed MSVC compile errors (but missing functionality in LLL parser)
neth: fix fields again
Filter on block chain.
neth: vector for fields
Merge pull request #213 from caktux/fields

neth: fix fields again
Make use of Serpent if available.
git pushMerge branch 'develop' of github.com:ethereum/cpp-ethereum into develop
Fix for those without serpent.
Fix non-serpent cmake issue.
Better language determination.