Some updates to the isobar coefficienct classes

[Thomas Latham]

Allow the basename of the coeffset to be set by the user at construction (allows simultaneous fits with some isobar parameters not shared between slaves). Allow the fit range of isobar parameters to be configurable. More intelligent cloning of isobar coeffs to allow e.g. phases to be the same, CPV pars to be the same, etc.

[Thomas Latham]

(In [71]) A number of updates to the CoeffSet classes: allow specification of the basename just after construction to stick, allow configuration of the parameter fit ranges, more adaptable cloning of the parameters, allow CP pars to be second-stage in Belle and CLEO formats. oktotest #20

[Thomas Latham]

(In [76]) Some additional functionality for the CoeffSet classes:

• allow the parameter values to be set (optionally setting the initial and generated values as well)
• allow the parameters to be set to float or to be fixed in the fit

These are needed when cloning but wanting some of the parameters to have different values and/or floating behaviour from the cloned set. Improve the printout of the setting of the coefficient values in the fit models and the creation of resonances Fix bug setting resAmpInt to 0 for LauPolNR Add LauFlatNR for the unform NR model - ends its rather strange special treatment Many other improvements to the info/warning/error printouts Modify GenFitBelleCPKpipi example to demonstrate cloning in action Add -Werror to compiler flags (treats warnings as errors) addresses #19 addresses #20