Merge branch 'feature/amiramesh'

* feature/amiramesh:
  tests for amira landmarks functions
  document return type of read.amiralandmarks
  fix typos after argument renames
  Add @family amira to documented functions
  read/write amira landmarks
  Add is.amiramesh and amiratype functions
  fix reference to non-existent con variable
  test for 8 bit amiramesh data
  add additional equivalence test for hzip/rle data
  test for read.zlib
  tests for new read.amiramesh hxzip/rle functionality
  implement reading of hxzip types
  implement reading of rle encoded files