Improve infernal wrapper
Improve infernal wrapper

1. close file descriptors
2. take str as input for cmscan_sequence()
3. improve doc

mortonjt/micronota,RNAer/micronota,tkosciol/micronota,tkosciol/micronota,RNAer/micronota,biocore/micronota,mortonjt/micronota,biocore/micronota