PDAL/PDAL — pull request #475 by hobu (2014-09-19 18:27:54+00:00)
Title: Metadata needs to sanitize names

We shouldn't allow `:`'s or `;`'s or ` `'s in metadata names. Should we sanitize them when handed to us (I propose they all be turned into `_`'s, or should we error and make the client sanitize them (might not be possible)?