Updated mpcac function using plot_data and plot_func, added overload for Vector{Corr}, added optional return to plot obj, updated documentation

corr_obs_TMS updated with gaps in measurements and automatic detection of the gaps

t0_phys changed from Bruno et al to the value from internal analysis

corr_obs_TSM now supports different statistics between sloppy and correction without neglecting the correlation. Extra flags idm_corr, idm_sl, nms have been added to allow this feature.
Documentation added

This reverts commit f3531bef.

several functions, needs testing

functions for TSM runs.
read_mesons_correction -> read correction runs (exact + sloppy solutions)
corr_obs_TSM -> create Corr with <O_sloppy> + <O_correction>

Study and preliminary tests  on correlated fits

if der==0 -> do not call uwreal

plots modification in juobs_obs

added Mb physical in const

Class Corr extended with extra arguments \theta1 and \theta2 inherited  from CHeader. Required for 3-pt analysis with momentum injection