Merge pull request #250 from ederc/v094

prepares v0.9.4

Merge pull request #247 from ederc/v093

prepares v093 release

Merge pull request #236 from ederc/v092

prepares v092

Merge pull request #232 from ederc/091

prepares v0.9.1

Merge pull request #223 from ederc/new-release

Preparing v0.9.0

Merge pull request #209 from ederc/new-release

updates version numbering

Merge pull request #198 from ederc/v075

prepares v0.7.5

Merge pull request #194 from ederc/0-7-4

prepares v0.7.4

Merge pull request #186 from ederc/0-7-3

prepares v0.7.3

Merge pull request #180 from ederc/0-7-2

Prepares release of v0.7.2