Fixed all the imports; cleaned some commented code.
Deleted folder labs.
Merge remote branch 'upstream/master'
Merge branch 'master' of https://github.com/ramon-astudillo/lxmls-toolkit into draft

Updated with Andres last reorganization, but kept the same differences with the previous commit

Conflicts:
	lxmls/labs/day2.py
	lxmls/labs/day3.py
	lxmls/sequences/hmm.py