3.4.0b4

• Brand new implementation of small scales injection for Synchrotron PR 134 <#134, affects s4, s5, s6, s7
• Brand new implementation of small scales injection for GNILC Dust PR 133 <#133, affects d9, d10, d11
• Fix bug in InterpolatingComponent, when the user requested a frequency between 2 available points, the weighting of the 2 relevant maps was switched, see #129
• Implemented a proper unit test of the running trapz implementation used for bandpass integration against np.trapz, see #129
• Imported WebSky extralactic components from so_pysm_models, now version 0.4, it also includes SPT based correction for CIB #129
• apply_smoothing_and_coord_transform now supports a different output resolution and supports doing both HEALPix and CAR in the same execution, also added best practices for dealing with resolution in the docs #125
• Model has max_nside attribute which specifies its max resolution https://github.com/galsci/pysm/ pull/124