v0.11.2
* remove name from index column * limit pandas to 0.24.0 * fix typo * compare index to id column * set index of each group to id column * pin pandas to 0.23.4 in on travis
* remove name from index column * limit pandas to 0.24.0 * fix typo * compare index to id column * set index of each group to id column * pin pandas to 0.23.4 in on travis