Implement SourceMapConsumer.allGeneratedPositionsFor.
Merge pull request #139 from ejpbruel/master

Implement SourceMapConsumer.allGeneratedPositionsFor.
Implement SourceMapConsumer.prototype.computeColumnSpans.
Merge pull request #141 from ejpbruel/new-pull-request

Implement SourceMapConsumer.prototype.computeLastColumns.
Allow ./ prefix in source paths
Merge pull request #145 from jryans/rel-prefix

Allow ./ prefix in source paths
Bump to version 0.1.41