Added the new branch to configure the bashrc in medusa.
Modified the README.txt file to accurate with this branch.
Deleted one wrong line.
Modified the aliases file to have all aliases working for the master branch of tiniba.
Changed the alias abinit to use the Sean's abinit version.
Enabled two aliases to run abinit. 'abinit' runs abinit 7.0.5 for the hexas; 'abinits' runs the sean's version.
Changed the alias 'abinits' to 'sabinit' for the Sean's abinit version.
Added the 'git commit -am' alias.
Modified the medusa aliases to have it in two files and merge thir branch with master.
Merge branch 'medusa_conf'

This merge was made to unify the branches and have only one. This will work in
medusa and in mu pc.