* update files
* fix Dialyzer warning
* unconditionally enable info fil
* clean-up inconsistencies
* use term_to_binary compression
* use try...catch instead of case...catch...of
* do not write build info file if the graph is unmodified
* store info file as <base_dir>/.rebarinfo
* properly support list of compile directives
* fix regressions:
 - Fix a bug in handling of files to compile first.
 - If a file that is depended upon itself depends on other files, make sure
   those are compiled first. While at it, rename variables for correctness.
   Reported-by: David Robakowski
 - Make sure that FirstFiles has no dupes and preserves the proper order.
 - headers referenced via -include_lib() were not properly resolved to absolute
   filenames
 - .erl files found in sub dirs of src_dirs were not properly resolved to
   absolute filenames

Added new property to `eunit_opts` option list:

  reset_after_eunit::boolean() - default = true.
      If true, try to "reset" VM state to approximate state prior to
      running the EUnit tests:
          * Stop net_kernel if it was started
          * Stop OTP applications not running before EUnit tests were run
          * Kill processes not running before EUnit tests were run
          * Reset OTP application environment variables