LB metrics for CollapsedTree and sequence-based fitness for simulation (#69)

* LBI/LBR as tree attributes

* initialize sim with N_init cells, and use arbitrary sequence>fitness map

* τ > tau

* linting and formatting

* gitignores for docstuff

* a convenient interface for colormaps on trees

* rendering demo notebook for docs with nbsphinx

* improve local branching docstring

* a comma, just a comma

* deploy docs

Author: wsdewitt

.gitignore

@@ -9,14 +9,6 @@
 # example output dir
 _build
 
-# files generated by quickstart example
-docsrc/gctree.out*
-docsrc/outfile
-docsrc/outtree
-docsrc/deduplicated.phylip
-docsrc/abundances.csv
-docsrc/dnapars.cfg
-
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

docs/.buildinfo

@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: 9749cc161fb0de1e889e11f3ac743620
+config: b4efad47ea6023cbc794715f9c45988c
 tags: 645f666f9bcd5a90fca523b33c5a78b7