broadcasting dictionaries is not allowed

update in getall_eigvals and uwerr(ydata) removed in juobs_tools.jl/fit_routine in order to choose a different wpm windows. Otherwise it does not work

format modifications in doc

get_chi2 + fit_routine restructured 

fit_routine uses Optim
LsqFit deps removed.

functions that calls uwerr now includes wpm

cdata = [[data_r1[k], data_r2[k]] for k=1:length(data_r1)]
is no longer needed

mean(rw) was computed replica by replica

md_reader sign problem fixed

uwerr missing
dof not reading length

doc updated + minor redefinition

input xdata Array{Real}

find_xmin to be tested (issues with double exponential fits)

find_xmin to be tested (issues with double exponential fits)

(juobs_obs, juobs_reader and juobs_tools)

Obs -> Corr (meff and dec_const_pcvc return Vector{uwreal})
2 linear_fit methods added

dec_const_pcvc is completed, new methods, Corr->Obs, Obs constructors added,  L normalization

juobs_obs added,   meff and plat_av moved to juobs_obs, Corr now includes y0,  syntax simplified(Symbol), Plots->PyPlot, LatexString support