photoz added
Error checking codes. Minor modifications,

This commit adds input data error checking in all functions. Several
minor modifications were also performed throughout the code.
Correction of breaking errors.
Violin plot

The violin plot option was added to the plot_photz function.
Refactoring

Homogenizing the function names.
Refactoring
Refactoring
Refactoring
data added
data added in R format
bug fixed in function TrainGLM
add number of PCs for 95% and 99% of variance
changes in the TrainGLM function
Shiny application
Error messages

Correction in the error message text of four functions.
Shiny application

Minor correction of the readme file
Shiny application

Adding default values to computeCombPCA so the shinny application will
not crash.
Photoz. Quantile regression added
Merge branch 'master' of https://github.com/RafaelSdeSouza/CosmoPhotoz

Conflicts:
	R/glmTrainPhotoz.R
removed quantile function