Use path.join instead of path.resolve

This ensures the case of the path is consistent with how require resolves
paths.

Closes #2486
Add back core spec require

This was accidentally deleted in #2462
Normalize resource path before creating app

This ensures the drive letter case is consistent with the format
used by require.
Add example for unset! directive
Move explanation for unset! example into the text
Mention how to get the full stack trace for errors
Issue reports should include Atom version and OS
Normalize resource path in AtomWindow constructor
Match backslashes in stack traces on Windows
Normalize resource path in remaining locations
Add missing l to global
Use path.join instead of path.resolve

Applies commit 41ab48b to spec-bootstrap.coffee
Upgrade to jasmine-tagged 1.1.2
Upgrade to apm 0.62
Upgrade to find-and-replace@0.112
Upgrade to find-and-replace@0.113
:checkered_flag: Use ctrl-alt-shift-p for logging

Previously this was bound to both log cursor specs and run package
specs and run package specs seemed to be a more valuable and commonly
run command.
:penguin: Use ctrl-alt-shift-p for logging cursor scopes