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*	Changes in islasso	*
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version 1.1.1
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* New implementation of the estimating algorithm. Now islasso is much stabler and faster reducing the number of iterations to reach convergence.
* Some bugs fixed.

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version 1.1.0
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* New implementation of the estimating algorithm. Now islasso is much stabler and faster reducing the number of iterations to reach convergence. 
* New changes:
- step Halving with Armijo's rule has been implemented.
- the algorithm includes the possibility to use the elastic-net approach defining an alpha parameter in the objective function as in glmnet package.
- the summary method includes now the degree of freedom for each covariate, and in addition it is possible to choose between t-test or z-test (only for gaussian family).
- optim.islasso has been renamed as aic.islasso the interval specification is not required now, the new  select the best tuning parameter based on the minimization of the AIC or the BIC.
- the function islasso.control has been renamed as is.control and some control parameters have been modified.
- two trace version has been implemented in the function is.control a compact version (trace=1) and a long version (trace=2).
* Some bugs fixed.
