Added easyseedlink module
Update README.md

add gitter badge linking to obspy/obspy chat room
Rebase from obspy master version and implementation of flags datation
Update docstring and documentation
Rebase from obspy master version and implementation of flags datation
Resolution of rebase conflict error
Correction of how record start time should be read
Merge pull request #876 from bmorg/easyseedlink

Easy-to-use SeedLink interface
Merge pull request #891 from sfieux/mseedfixedflags_datation

MiniSEED fixed flags - improve issue855 PR to allow datation of flags