fix(vk_profile): use string "T-a-T" directly (it has no translation)

This closes #124.
fix(i18n): IDL( X, 2) returns translated string when no brackets

IDL( "hello", 2 ) now returns "world" if translation is "world".
It previously returned "orl" (without "w" and "d").

This closes #128.
feat(init): offer changelog after installation

See #86 for more info.

- add install.changelogHtml(), store template in separate .jade file
- add mainMenu.extensionMenuItemHtml(), store template
in separate .jade file
- store flag showing that there was an install in localStorage
- after install show red version next to the extension menu.
Open changelog (now empty) on click and don't show the red button anymore
- use "brfs" Browserify transform to base64-encode icon

This closes #86.
fix(build): don't use "brfs" transform for "node_modules"

It was breaking unit tests. See #130.
We don't care about "fs.readFileSync()" in dependencies,
it's their own business.

This closes #130.
fix(i18n): use "OK" instead of app.i18n.IDL("OK")

This closes #125.