Merge pull request argotorg#1418 from ethereum/develop

Release 0.4.6

Merge remote-tracking branch 'origin/develop' into release

Merge pull request argotorg#1405 from ethereum/version

Update version.

Merge pull request argotorg#1405 from ethereum/version

Update version.

Merge pull request argotorg#1308 from ethereum/develop

Merge for version 0.4.4

Merge remote-tracking branch 'origin/develop' into release

Merge pull request argotorg#1107 from ethereum/develop

Version 0.4.2

Merge pull request argotorg#1073 from ethereum/develop

Release merge for 0.4.1

Merge pull request argotorg#1061 from ethereum/version

Set version to 0.4.0.

Merge pull request argotorg#859 from chriseth/fixppa

Fix ppa script