Evelink

New/updated endpoints:
- Updated `Char.kills()` and `Corp.kills()` to use the KillMails short-cache endpoint.
- The old long-cache endpoint is still available, but renamed to `kill_log()` instead.
- Both endpoints have the same type signature, so this should be backwards-compatible.

New/updated endpoints:
- Added endpoints for Planetary Interaction information:
- `Char.planetary_colonies`
- `Char.planetary_links`
- `Char.planetary_pins`
- `Char.planetary_routes`
- Removed medical clone information from `Char.character_sheet`.
- `EVE.character_id_from_name` is no longer case-sensitive.

Other changes
- Added the `six` library as an explicit dependency.
- Fixed synchronous API access in AppEngine apps.


0.6.0p2
Resolves an issue where installation via `pip` would fail due to a missing `README.md` file.

**This release contains changes that are not backwards-compatible.**

New/updated endpoints:
- `Corp.facilities()` added, wraps corp/Facilities (manufacturing)
- `Corp.customs_offices()` added, wraps corp/CustomsOffices
- `Char.character_sheet()` has been updated for Phoebe to include more data:
- Jump fatigue
- Home station, last remote station jump time
- Respecs, free SP
- Implants
- Jumpclones (including their implants)
- Attribute modifiers **no longer directly available**; if you relied on this you'll need to use the new implant info to compute yourself.
- `Account.status()` now includes multi-training timers
- `eve.certificate_tree()` has been removed, since certificates were removed from EVE.

Other changes
- HTTP errors that are not used as a wrapper for EVE XML API errors will now be raised as the appropriate exception classes rather than being raised as `APIError` instances.
- The `bin/evelink` command line tool has been updated to work properly with Python 3.