API: cache is now by tip
ENH: smarter tip and non-tip lookups
merge fix
Merge branch 'master' of github.com:biocore/scikit-bio into cache_fix

Conflicts:
	skbio/core/tree.py
ENH/API: assign_ids now matches IDs from index_tree, to_array now
returns an array representation of the tree
Merge branch 'master' of github.com:biocore/scikit-bio into to_array
Merge branch 'master' of github.com:biocore/scikit-bio into to_array

Conflicts:
	skbio/core/tests/test_tree.py
Remove custom stylesheet

Fixes #339.
Added links to projects
Added some text
Add Google Analytics tracking

Fixes #240.
fixes #300
Merge pull request #341 from johnchase/projs

Projs
Merge pull request #340 from ElBrogrammer/doc-style-fix

Remove custom stylesheet
Merge pull request #320 from wasade/to_array

To array
permutations changed from 10000 -> 1000
Merge pull request #345 from ebolyen/issue183

permutations changed from 10000 -> 1000