Add tolerance for sending from mixed-case addresses.

We had to convert to lower case, and also had to modify the new provider-engine sanitizer to tolerate mixed case addresses.

Fixes #707

app/scripts/lib/id-management.js

@@ -26,7 +26,7 @@ function IdManagement (opts) {
   this.signTx = function (txParams) {
     // normalize values
     txParams.to = ethUtil.addHexPrefix(txParams.to)
-    txParams.from = ethUtil.addHexPrefix(txParams.from)
+    txParams.from = ethUtil.addHexPrefix(txParams.from.toLowerCase())
     txParams.value = ethUtil.addHexPrefix(txParams.value)
     txParams.data = ethUtil.addHexPrefix(txParams.data)
     txParams.gasLimit = ethUtil.addHexPrefix(txParams.gasLimit || txParams.gas)
@@ -51,7 +51,7 @@ function IdManagement (opts) {
 
   this.signMsg = function (address, message) {
     // sign message
-    var privKeyHex = this.exportPrivateKey(address)
+    var privKeyHex = this.exportPrivateKey(address.toLowerCase())
     var privKey = ethUtil.toBuffer(privKeyHex)
     var msgSig = ethUtil.ecsign(new Buffer(message.replace('0x', ''), 'hex'), privKey)
     var rawMsgSig = ethUtil.bufferToHex(concatSig(msgSig.v, msgSig.r, msgSig.s))

package.json

@@ -82,7 +82,7 @@
     "through2": "^2.0.1",
     "vreme": "^3.0.2",
     "web3": "ethereum/web3.js#260ac6e78a8ce4b2e13f5bb0fdb65f4088585876",
-    "web3-provider-engine": "^8.1.3",
+    "web3-provider-engine": "^8.1.5",
     "web3-stream-provider": "^2.0.6",
     "xtend": "^4.0.1"
   },