Use explicit floating point in complex literals

icc doesn't like the '1j' syntax; it produces this error message:
error #1909: complex integral types are not supported
Make symlink to sky_map.so so that it can be imported in unit tests
Enable BAYESTAR unit tests
Fudge factor for excess estimation error in gstlal_inspiral
Revert to using Gaussian likelihood for TOA-only localization
Revert "Revert to using Gaussian likelihood for TOA-only localization"

This reverts commit 12c95ddcef2ff1b5618fc9734fbced8a05a7baa5.
Use crude adaptive mesh refinement in place of TOA-only localization
Refine mesh based on probability, not probability density
Ignore underflow errors
Disable GSL 1.15-only code if GSL is too old