Create zabbix_js utility

Create zabbix_js utility for embedded script testing. This utility must execute user script with a string parameter and print the result.

Supported parameters:

• -s <filename> - the filename of script to execute. If '-' specified as filename the script will be read from stdin
• -i <filename> - the filename of input parameter. If '-' specified as filename the input will be read from stdin
• -p <parameter> - the input parameter (to specify parameter from command line without using files)
• -l <parameter> - the log level (Zabbix log level value)
• -t <parameter> - the timeout

In the case of compilation of execution errors zabbix_js must print the error in stderr and exit with exit code 1. Otherwise zabbix_es must print the value returned from script.

Any logging must be also written to stderr.