Update README.md
Merge branch 'master' into develop

Conflicts:
	README.md
Merge branch 'develop' of github.com:jhamman/RVIC into develop
change travis icon to master branch
fix to MFILT history option for month or year chunksize.
update version string
Improve fix to MFILT history option for month or year chunksize.
avoid copying via numpy append in rvic.core.param_file.group(), limit plots to 1000 traces
Merge pull request #28 from jhamman/feature/avoid_param_copy

Feature/avoid param copy
add check to insure that all forcing values are non-fill-values inside routing mask
Merge pull request #29 from jhamman/check_for_fill_vals

Check for fill vals
Merge pull request #30 from jhamman/check_for_fill_vals

Check for fill vals
Merge pull request #26 from jhamman/hotfix.1.0.1

hotfix.1.0.1