python3: add byte prefix for objects that look like kwargs but aren't The `byteify-strings.py` script has no way of knowing that those aren't acutally kwargs since it works purely at the tokenization level, so we have to add the byte prefix to their keys manually.

python3: mark all SQL queries as raw strings

python3: prefix all regex to work with python 2 and 3

pick: added support for hg abort This patch isolates abort logic for `hg pick --abort` as `abortpick()`. For independent calls via `hg abort` `hgabortpick()` is created and registered to the state detection API. Results are shown as tests.

pick: factor our the abort function This prepare the upcoming support for `hg pick` in `hg abort.

abort: added support for evolve to hg abort This patch adds support of `hg evolve --abort` to `hg abort` plan. This involves creating a `hgabortevolve()` function under `evolvecmd` which ensures abortion of evolve via `hg abort`. This function is then registered using `addunfinished()` in `__init__.py`. Results are shown as tests.

evolve: fixed lock acquire before checking state Before checking the states `repo.lock()` and `repo.wlock()` need to be acquired. This was not happening in `evolve()` earlier. This patch creates a seperate `_performevolve()` funtion which can be then called with locks acquired. This also removes the redundant lock acuquiring of `abortevolve` and `continueevolve` as lock is now taken earlier.

py3: add back a progress(0) call lost in 8664231b47ac I don't think it really matters, but it wasn't intentional, so let's just restore the old behavior.

prune: adjust 'nothing to prune' to imply user needs to specify revs to prune

rewind: working directory is the preferred term

rewind: add command synopsis

py3: make setup.py py3 compatible

branching: merge stable back into default The version has been released.

packaging: mark as development version This help to avoid confusion when installing version from source.