API: added Table.subsample
DOC: updated how ValueError is thrown
Merge branch 'master' of github.com:biocore/biom-format into issue_125_sample

Conflicts:
	biom/table.py
	tests/test_table.py
API: removed replace, thanks @josenavas
ENH: cython'd subsample
Merge branch 'master' of github.com:biocore/biom-format into issue_125_sample
ENH: cythoned
Merge branch 'master' of github.com:biocore/biom-format into issue_125_sample
BUG/DOC: addressing @Jorge-C's comments
DOC: add exmaple for table.reduce
DOC: addressing @ElDeveloper's comments, thanks\!
DOC: remove extra whitespace
DOC: fix whitespace
DOC add descriptions
Merge pull request #397 from wasade/issue_125_sample

API: added Table.subsample
Revert "Merge pull request #404 from josenavas/travis"

This reverts commit bc126f0aa9b3667d5c88d541e20b0481f9438509, reversing
changes made to f595430a1588f43086adaf9839a643c56b11ca1c.
Merge pull request #413 from teravest/reduce_example

DOC: add exmaple for table.reduce
Merge pull request #418 from ElDeveloper/fix-build-matrix

Revert "Merge pull request #404 from josenavas/travis"