Changes

Latest batch of non-bit changing code changes - CLUBB ticket #1115 (#1119)

- Added new folder input/tunable_parameters_tauMatchLscale/ for latest taus code setup reproducing the master Lscale output.
- Changes in src/CLUBB_core_mixing_length.F90:
   - Renamed ddzt_umvm -> ddzt_umvm_sqd
             ddzt_umvm_clipped -> ddzt_umvm_sqd_clipped
             sqrt_ddzt_umvm -> norm_ddzt_umvm
             smooth_sqrt_ddzt_umvm -> smooth_norm_ddzt_umvm
             Ri_zm_clipped -> Ri_zm_smooth in some places
   - Made some variable replacements for consistency's sake
- Fixed path of log files in run_scripts/run_bindiff_all.py

BIT_CHANGING! Fixed some issues with wpxp_Ri_exp, changed z_displace value - CLUBB ticket #1115 (#1120)

- Removed commented lines from tunable_parameters.in file in input/tunable_parameters_tauMatchLscale
- Increased z_displace value from 10 to 25. This value was chosen so that the taus code with the parameter and flag settings in input/tunable_parameters_tauMatchLscale match the master Lscale output below clouds
- Fixed some issues with the new parameter wpxp_Ri_exp:
   - Moved new exponentiation to a place so that it emulates the previous version with sqrt(Ri_zm)
   - Adjusted code for l_smooth_min_max=true to match the default version