WIP: remove all but 2^19937-1 code
Remove random_wh06 test codes
Change sfmt.app.src vsn to 0.9.0
Update README.md for 0.9.0
rebar.config: comment out exotic C compiler options

* Most of these exotic C compiler options will not work on clang
* Some people will use the compiler options anyway
  so these are still documented
Add generic optimization options to rebar.config
Add CONTRIBUTING.md
Add non-GitHub path to CONTRIBUTING.md
rebar.config: CFLAGS now assume x86_64 arch for clang
Remove MSC code from c_src/sfmt_nif.c
Remove CFLAGS -arch option

* This option will cause a compilation error at gcc on Fedora
* No need to have this option if the system is properly configured...
Add CHANGES.md
Update README.md for 0.9.1_RELEASE
Change support/getrebar to run also on 17.0

* See https://github.com/tuncer/re2/pull/4
* Starting application `asn1` required before running application `public_key`
Add bugfix notice on support/getrebar for 17.0
CHANGES.md: change 0.9.1_RELEASE to 0.9.1_BETA
Removed pre-c99 ifdef code and PRIu64 switch
sfmt_nif.c: Remove unused inline macros
rebar.config: Remove cryptic gcc-specific flags from the examples
Add .travis.yml for Travis CI