Fix missing kadira options bug

	- `kadira.js` is now loaded after error reporters for `Kadira.options`
		is not available inside error them.
Fix waiting tests

tests didn't complete because error tracking was disabled at that point
Add appId
Add support for custom errors
Add custom error support for server
Add custom error support for client
Merge pull request #67 from mnmtanish/bugfix-missing-kadira-options

Fix missing kadira options bug
Merge pull request #69 from mnmtanish/custom-errors

Custom errors