Add some useful links to README.
Finish switch over to node-gyp. Fixes #87.
Various Node.js 0.10.x fixes.
Bump version to 0.2.8.
Add version parameter to pubKeyHashToAddress.
Test suite: Link to binding.js instead of native module directly.

Fixes test suite failure.
Fix for Node.js 0.10.x. Buffer parser should throw on EOF.

The current script engine expects the buffer parser to throw an exception if it
unexpectedly encounters the end of the file. This used to be default behavior in
Node.js' Buffer#slice, but changed in 0.10, so we need to throw manually.
Migrate to levelup
Update leveldb Storage#dropDatabase for levelup.
Update README with Node 0.10 req.
Don't install MongoDB module by default anymore.
Update Storage#saveAffects for levelup.
fixed one of bugs in  getAffectedTransactions
Apparently up until now getAffectedTransactions returned $SUBJ only
for the last addrhash specified. Nobody notices.

Signed-off-by: Karel Tuma <karel.tuma@gmail.com>
Merge pull request #97 from katuma/staging

getAffectedTransactions fixes
Formatting fix.
Migration to leveldown.

Added a leveldown DB handler.
Update storage.js

Add support for the leveldown:// protocol.
Update package.json

Added leveldown dependency.
Fix NotFound detection in leveldown storage module.

Error name is not defined in LevelDOWN so error message is used to identify NotFound error.