Spec2nexus

* `60 <https://github.com/prjemian/spec2nexus/issues/60>`_
Add new plugin test for XPCS plugin (thanks to John Hammonds)

* `57 <https://github.com/prjemian/spec2nexus/issues/57>`_
keep information from unrecognized control lines,

* `56 <https://github.com/prjemian/spec2nexus/issues/56>`_
add *specplot* support,

* `55 <https://github.com/prjemian/spec2nexus/issues/55>`_
accept arbitrary number of MCA spectra

* `36 <https://github.com/prjemian/spec2nexus/issues/36>`_
identify NIAC2014-compliant NeXus files

* `45 <https://github.com/prjemian/spec2nexus/issues/45>`_
handle case when no data points in scan ,

* `46 <https://github.com/prjemian/spec2nexus/issues/46>`_
spec.getScan() ensures argument is used as ``str``