fix nginx parser bug

Path field match is not strict, may cause data loss
fix parameter handling of :time_key in LabeledTSVParser.

without this fix, ValuesParser#configure will throw ConfigError if there
is :time_key since :keys are overridden as empty string in child class.
Merge pull request #106 from yyuu/fix-ltsv-time-key-handling

LabeledTSVParser cannot handle time_key and time_format
Merge pull request #105 from loveshell/patch-1

fix nginx parser bug
Add nginx test for empty path
Add in_gc_stat and in_status tests. fixes #63
fix to get lock of Status
 * to wait plugin registration when in_status iterate hash (race condition: thread unsafe)
in_tail: fixed nil error problem of pos_file
Fix rubygems resource, http -> https
v0.10.32