prepare v0.6.0
prepare dist package
change default log config
include all sub modules
support package level static data
Detect and change storage dir intelligently:

   * If CWD has "conf" and "save", use CWD.
   * Else, use "~/.snsapi"
more of v0.6.0
fix typo: classifier
fix the method routing logic of SNSPocket:

   * Previously, if 'channel' arg is given and it is expired,
   pocket will operate on all other channels.
   * Besides, the existence of 'channel' in pocket is not checked.
v0.6.1 improve packaging
Change 'provides' to a list.

   * a single str is OK according to the doc.
   * However, the PyPI website does not render it correctly.
   https://pypi.python.org/pypi/snsapi/0.6.1/
address Issue #86 with setuptools
v0.6.2
put the doc of attachment to mandatory and re-typeset it
solve merge conflict in snspocket