Merge pull request #20 in SNORT/snort3 from fileclass2 to master

* commit '6926f210c4eb4fb229b92ccf8e7cf5acaeae01a8': (54 commits)
  reorder the header files
  fix compiler warning and regressions
  Remove mime state: STATE_DATA_UNKNOWN
  Check file processing for response
  fix nhttp checks
  update interfaces based on comments
  add devnotes
  fixed comments and spaces
  add unit tests for file magic
  update decode configurations
  File API removed
  fixed compiling errors
  add file flows
  remove unused functions
  File service class
  file api update
  remove service config
  minor name change
  file name changed
  decode buffer update
  ...