Update/correct some citation suggestions.
Merge pull request #55 from ketch/citation

Update/correct some citation suggestions.
Instructions for controlling logging in PyClaw.
Add more detail to logging docs
Rephrase critical logger level description
Merge pull request #1 from mandli/ketch-logging

Add more detail to the description of the verbosity numbers and logging
Merge pull request #56 from ketch/logging

Instructions for controlling logging in PyClaw.
added hints on reading gauge data
fix release_5_1_0.rst and add changes_to_master.rst and first draft of release_5_2_0.rst
tag v5.0.0 exists in geoclaw so use it
started to document new fgmax features
Merge pull request #57 from rjleveque/changes_to_master

Keep track of changes to master
Bump required python version 2.5 -> 2.7
Merge pull request #58 from mandli/bump-python-version

Bump required python version 2.5 -> 2.7
Outline of a paper on Clawpack 5.x