removed useless .ini and .pre files; added input files matching Planc…

…k baseline models; struct_cleanup() now done automatically; several minor bug fixes

* 2.7:
  updated version number to 2.7.1 and doc
  small improvements in setup.py with absolute directory paths
  completed the fix for minor precision issue, relevant only with k_output_values + rkck evolver
  fixed small things for a neat compilation even with -Wall
  Completed changes in output for _cb with isocurvature; output indented; not yet tested
  Fixed comments and indentation in _cb part of spectra.c
  P_cb changes reviewed and checked up to transfer.c included
  added comment and improved style of P_cb correction  in nonlinear m odule. Yet to be tested.
  fixed minor precision issue, relevant only with k_output_values + rkck evolver
  Fixed small scanf counting mistake.
  updated the set of .pre files
  updated the set of .ini files
  Fixed whitespace and indentation.
  fixed a problem in the manual from release 2.7, and removed unnecessary files from the RSI
  Python wrapper: Prevent memory leaks from occuring.
  fixed small inconsistency in many_times.ipynb leading to errors with linux
  Added handling of printouts, which were generating spurious warnings during compilation. Furthermore, the code should be slightly safer now.

.gitignore

@@ -7,5 +7,7 @@ class
 libclass.a
 *out
 python/classy.c
-python/*.pyc
+*.pyc
 python/build/
+RealSpaceInterface/cache/
+.DS_Store

base_2015_plikHM_TT_lowTEB_lensing.ini

@@ -0,0 +1,62 @@
+# *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*
+# *  CLASS input parameter file  *
+# *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*
+
+# Best fit parameters from Planck 2015
+# Case 2.59 of:
+# https://wiki.cosmos.esa.int/planckpla2015/images/f/f7/Baseline_params_table_2015_limit68.pdf
+# (but with more significant digits, directly from the chains)
+
+#----------------------------
+#----> background parameters:
+#----------------------------
+
+H0 = 67.86682
+omega_b = 0.02227716
+N_ur = 2.03066666667
+omega_cdm = 0.1184293
+N_ncdm = 1
+omega_ncdm = 0.0006451439
+
+#--------------------------------
+#----> thermodynamics parameters:
+#--------------------------------
+
+YHe = 0.245352
+tau_reio = 0.06664549
+
+#-------------------------------------
+#----> primordial spectrum parameters:
+#-------------------------------------
+
+n_s = 0.9682903
+A_s = 2.140509e-09
+
+#-----------------------------
+#----> non linear corrections:
+#-----------------------------
+
+non linear = halofit
+
+#----------------------------------------
+#----> parameters controlling the output:
+#----------------------------------------
+
+output = tCl,pCl,lCl,mPk
+lensing = yes
+
+root = output/base_2015_plikHM_TT_lowTEB_lensing_
+
+write warnings = yes
+write parameters = yes
+
+input_verbose = 1
+background_verbose = 1
+thermodynamics_verbose = 1
+perturbations_verbose = 1
+transfer_verbose = 1
+primordial_verbose = 1
+spectra_verbose = 1
+nonlinear_verbose = 1
+lensing_verbose = 1
+output_verbose = 1

base_2018_plikHM_TTTEEE_lowl_lowE_lensing.ini

@@ -0,0 +1,62 @@
+# *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*
+# *  CLASS input parameter file  *
+# *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*
+
+# Best fit parameters from Planck 2018
+# Case 2.17 of:
+# https://wiki.cosmos.esa.int/planck-legacy-archive/images/b/be/Baseline_params_table_2018_68pc.pdf
+# (but with more significant digits, directly from the chains)
+
+#----------------------------
+#----> background parameters:
+#----------------------------
+
+H0 = 67.32117
+omega_b = 0.02238280
+N_ur = 2.03066666667
+omega_cdm = 0.1201075
+N_ncdm = 1
+omega_ncdm = 0.0006451439
+
+#--------------------------------
+#----> thermodynamics parameters:
+#--------------------------------
+
+YHe = 0.2454006
+tau_reio = 0.05430842
+
+#-------------------------------------
+#----> primordial spectrum parameters:
+#-------------------------------------
+
+n_s = 0.9660499
+A_s = 2.100549e-09
+
+#-----------------------------
+#----> non linear corrections:
+#-----------------------------
+
+non linear = halofit
+
+#----------------------------------------
+#----> parameters controlling the output:
+#----------------------------------------
+
+output = tCl,pCl,lCl,mPk
+lensing = yes
+
+root = output/base_2018_plikHM_TTTEEE_lowl_lowE_lensing_
+
+write warnings = yes
+write parameters = yes
+
+input_verbose = 1
+background_verbose = 1
+thermodynamics_verbose = 1
+perturbations_verbose = 1
+transfer_verbose = 1
+primordial_verbose = 1
+spectra_verbose = 1
+nonlinear_verbose = 1
+lensing_verbose = 1
+output_verbose = 1