Opentaxforms

- bugfix: tracking: rootForms must be same type in test_opentaxforms and main.

- css,template: add minimal tester interface.
- extract: make cryptic forms annotatable.
- html: add pdf link to html page.
- main: fix log.name in indicateProgress [still refers to the previous form].
- commandline: -f now takes multiple forms, comma-delimited.
- commandline: -C now means useCaches [not ignoreCaches], so the default runs [avoiding the pint registry error].
- make 'setup.py test' work again by adding pytest-runner.
- add PyPI version badge to README.md.
- remove unused db functions.
- bugfix: just import cross-module globals, dont assign.
- add logPrefix to config.
- add unsetup functions to config and ut for teardown between tests.
- pin versions of requirements in setup.py.

- add pylint config file.
- fix or silence all pylint errors.
- remove unused code from ut.py.
- use another project's pylintrc [pylint config file] as a starting point to reduce false positives.
- make linting more fine-grained [pylintrc-ut for ut.py, pylintrc for the rest of the code].
- integrate linting with tox.
- fail the build only for linting errors, not warnings.

- test: separate read-only database file from the overwritten one in test/.
- test: add script to run just the api tests.
- test: make api tests print feedback.
- fixed all linting errors [according to vim/syntastic] [just errors, not warnings].
- ran pep8ify.
- mv opentaxforms.py -> main.py.
- main.py: remove sys.setdefaultencoding [and reload].
- remove pointless path from tox env.
- README.md fixes/updates. landscape.io suggestions.

- move cmds.computeMath to Form.computeMath.
- refactoring cmds.computeMath to reduce function length:
- move sentence-level (instruction-level) parsing into class Parser.
- create class CommandParser.

- linting via landscape.io, including shortening long lines, removing unused variables, and refactoring some long functions.
- fixed all broken doctests.
- both cross-module globals, log and cfg, are now importable.