Support multiple max_repetitions values

This feature is used for big mapping table (>64). It allows to define in
shinken command a bigger value for max_repetition and also to define
another max_repetition value for the following getbulk requests.
Missing char in parse_args
Update documentation

Update installation process.
Add list of check_snmp_booster parameters
Merge pull request #6 from vherr/for_shinken_1.4

Add max_repetitions option for bulk request