Changes from 1.1.0 to 1.1.1

• Allow to delete all the columns in a ctable. Fixes #306.

• Double-check the value of a column that is being overwritten. Fixes #307.

• Use pkg_resources.parse_version() to test for version of packages. Fixes #322.

• Now all the columns in a ctable are enforced to be a carray instance in order to simplify the internal logic for handling columns.

• Now, the cparams are preserved during column replacement, e.g.:

  ct['f0'] = x + 1

  will continue to use the same cparams than the original column.

• C-Blosc updated to 1.11.2.

• Added a new defaults_ctx context so that users can select defaults easily without changing global behaviour. For example::

  with bcolz.defaults_ctx(vm="python", cparams=bcolz.cparams(clevel=0)): cout = bcolz.eval("(x + 1) < 0")

• Fixed a crash occurring in ctable.todataframe() when both columns and orient='columns' were specified. PR #311. Thanks to Peter Quackenbush.