Theme improvment

Adding colorthemelirae.sty based on chameleon
Adding logos in PDF
Reducing the title space in 5%
Adding watermark
Adding lirae logo in two columns with the presentation information
Removing old colorthemes
Adjusting the spaces for the two small logos
Adding comments to the colorscheme for future modifications
Signed-off-by: Cristian Maureira Fredes <cmaureir@csrg.inf.utfsm.cl>