2.0.0 (#296)

`anesthetic` 2.0.0 release

Substantial API, feature and packaging update.

For more detail, see the documentation:
https://anesthetic.readthedocs.io/en/latest/

To install the latest version:
```bash
pip install anesthetic
```

README.rst

@@ -2,7 +2,7 @@
 anesthetic: nested sampling post-processing
 ===========================================
 :Authors: Will Handley and Lukas Hergt
-:Version: 2.0.0-beta.44
+:Version: 2.0.0
 :Homepage: https://github.com/handley-lab/anesthetic
 :Documentation: http://anesthetic.readthedocs.io/
 

anesthetic/_version.py

@@ -1 +1 @@
-__version__ = '2.0.0b44'
+__version__ = '2.0.0'

tests/test_reader.py

@@ -17,6 +17,11 @@
     import getdist
 except ImportError:
     pass
+try:
+    from tables import Array  # noqa: F401
+    pytables_imported = True
+except ImportError:
+    pytables_imported = False
 
 
 @pytest.fixture(autouse=True)
@@ -237,9 +242,8 @@ def test_regex_escape():
 
 
 @pytest.mark.parametrize('root', ['pc', 'gd'])
-@pytest.mark.xfail('tables' not in sys.modules,
-                   raises=ImportError,
-                   reason="requires tables package")
+@pytest.mark.skipif(pytables_imported is False,
+                    reason="requires tables package")
 def test_hdf5(root):
     samples = read_chains('./tests/example_data/' + root)
     filename = 'test_hdf5.h5'