add travis-ci build status icon
make C++ compiler happy by not naming unused args in functions' calls.
to make life easier remove "require_otp_vsn"
Use EUnit's macros in tests.
Use iolist as an input data. Some cosmetic changes in README.
Small wording fix.
Deleted script that was used to build Snappy library.
Don't build Snappy library alongside with esnappy, instead use system…
… wide installed library.