Do not access dead objects
Fix process word behavior
Remove E4X dependency from KeySnail plugin system

Since Mozilla plan to remove E4X from their systems completely (WTF?),
we remove E4X dependency from KeySnail plugin system with this commit.

For plugin developers:

Don't too worry about compatibility issues. Based on a dirty
hack (script-rewriting), *KeySnail still allows you to use XML literal
to express PLUGIN_INFO*. Note that you cannot use most of wonderful
E4X features include expression-expansion, various query expressions,
and so forth.

R.I.P E4X.
Version 1.9.6: Support Firefox 15
HoK: Hide unmatched hints by default. Close #93
HoK: do not use element.hidden property
Add color theme solarized
Orange
Conform to soralized
Color theme solarized: Version 0.0.2 (Tweak scale and padding)
Do not use Monaco, which doesn't have bold / italic fonts
Hatebnail: Implement command to add private bookmarks
Merge branch 'master' of github.com:mooz/keysnail
site-local-keymap: Fix setting example for Gmail and initialization behavior
yatck: Use style.register() to define header styles
yatck: Convert tabs to whitespaces
hok: Add exts that follow "rel" links (previous / next). Closes #102
hok: Version 1.3.7
hok: Fix navigation patterns
Remove E4X from main components (ad-hoc). Closes #104