Fix up test runner so that it actually exit the process with the code as the number of failed tests.
Ensure that _generatedMappings is always sorted

Note that, eg, SourceNode.fromStringWithSourceMap depends on this
property. It implicitly assumes that generatedColumn is non-decreasing
within a line, and ends up passing negative numbers to substr otherwise!
Merge pull request #92 from meteor/sort-generated

Ensure that _generatedMappings is always sorted
Bumping the version number to 0.1.32
merging 0.1.32 changes from upstream
0.1.32