…PTIMIZATIONS`

```
var i = 0;
for (i; i < object.length; i++) {}
```

becomes

```
var i;
for (i = 0; i < object.length; i++) {}
```

Alternative (unreadable):

```
var i = 0;
for (; i < object.length; i++) {}
```

…ation in JSDoc

…y_Client` and `piwik_track` undeclared

…mpiler

This disables type warnings: `JSC_UNRECOGNIZED_TYPE_ERROR`, `JSC_TYPE_MISMATCH`, `JSC_WRONG_ARGUMENT_COUNT` and more.

…osure Compiler

…iwik.js`

…on for `piwik.js`

…k.js`

…for `piwik.js`

+ Copy all functions that begin with `this.nameOfFunction` from `function Tracker()` in `piwik.js`. Exclude functions inside `/*<DEBUG>*/ … /*</DEBUG>*/`-markers.
+ Rename inside `piwik.externs.js` via find `^this\.` and replace by `Tracker.`
+ Empty method bodies inside `piwik.externs.js` via find `\{(\n .+|\n)+\n\};` and replace by `{};`

…for `piwik.js` - fix `Tracker.optUserOut`

…o exclude them from Closure Compiler munging

…ct in quotes to exclude them from Closure Compiler munging

Some common JS names defined in the default Closure Compiler `externs` are not munged e.g.:
location, name, target, type, href, enabled, timeout, interval

When renamed by prepending with an underscore they get correctly munged.

Some common JS names defined in the default Closure Compiler `externs` are not munged:
find, push, trim

When renamed the functions and calls get correctly munged.

…definition for `piwik.js`