LogPrintf: standardized ASCII file-output functions for TimeSeries types

- for now: XLALdumpREAL4TimeSeries(), XLALdumpREAL8TimeSeries(), and
  XLALdumpCOMPLEX8TimeSeries()
Revert non-recursive build commits

- Revert "build_common.am: use test_{programs|scripts|helpers} variables for tests"
  This reverts commit 6f075a226574bc40e4f32816d120aea06e7e7a6c.
- Revert "LALStochastic: use non-recursive Makefile"
  This reverts commit 2aa9746e0d8e6e5d4bc0aa83014c601006ae34ff.
- Revert "LALMetaIO: use non-recursive Makefile"
  This reverts commit 8da5bf1e3f0ed1c0578f3c8878b9266062d82316.
- Revert "Reorganisation of non-recursive Makefile fragments"
  This reverts commit dd6e620f51a552d92122d93d40434e75d59b8f7e.
- Revert "LALXML: use non-recursive Makefile"
  This reverts commit c757c86711cf6124785e7c93b0419f2854ad148b.
.gitignore: ignore lal...-* tarball directories and _build/_inst directories
Empty Automake variable END_OF_LIST, useful for terminating file lists
Use CamelCase LAL library names in AC_INIT()
Set pkgincludedir to ${includedir}/lal during configuration
Common generation of include header links

- Header links are now generated during "make dist", since
  they made be needed by generated distribution sources
Remove gnuscripts/Makefile.am, not needed by modern Automake
Clean up top-level library Makefiles
Common user environment script generation in top-level library Makefiles
Common generation of VCS/build information headers and sources
Define extra CPPFLAGS in configure.ac instead of in each Makefile.am
Rename fragments cuda.common to lalsuite_cuda.am and vcsID.common to lalapps.am
Add missing _LAL_RESTRICT_/const qualifiers to FFT function arguments
SWIG: build system Mk. III

- Use single Makefile to generate interface and build Octave/Python bindings
- SWIG-generated sources are now distributed, and can be built without SWIG
Rewrite SpinTaylorF2 to more closely match the current version of TaylorF2.

Also optimize some functions, add some error checking for corner cases, and match TaylorF2's handling of f_ref.