Add Unanswered Calls Within Time Interval analysis

New aggregate report CallsWithinTheGivenTimeInterval with updated README. Fixed
typo in similarly-named class in README for AnsweredCalls equivalent.
Merge branch 'master' into unanswered_calls

Conflicts:
	lib/queri/stats/answered_calls/calls_fully_within_the_given_time_interval.rb
Merge branch 'master' into unanswered_calls
Add DisconnectionCauses class

New composite aggregate report DisconnectionCauses for Unanswered Calls with
updated README.
Add Unanswered Calls by Queue report

New composite aggregate report for UnansweredCallsByQueue with updated README
Add Unanswered O/B Calls by Agent report

New agent-level report for UnansweredOutboundCallsByAgent with updated README
Add Unanswered calls - Distribution by Length

New composite aggregate report for UnansweredCallsDistributionByLength with
updated README
Add Inclusive SLA analysis

New composite aggregate report for InclusiveServiceLevelAgreement with updated
README
Add Unanswered Calls by Key Press report

New agent-level report for UnansweredCallsByKeyPress with updated README
Add Unanswered Calls by Stints analysis

New composite aggregate report UnansweredCallsByStints with updated README
Add Unanswered Calls analyses

New composite aggregate reports AllCallsByStints, EnterQueuePosition,
and EnterQueuePositionForAllCalls with updated README
Add IvrSelection report

New composite aggregate report IvrSelection with updated README
Add IvrSelectionForAllCalls analysis

New composite aggregate report IvrSelectionForAllCalls with updated README
Add DnisUsed analysis

New composite aggregate report for DnisUsed with updated README
Add DnisUsedForAllCalls analysis

New composite aggregate report for DnisUsedForAllCalls with updated README
Add Call Overview analysis

New composite aggregate report CallOverview with updated README
Add Inclusive Answered SLA analysis

New composite aggregate report for InclusiveAnsweredServiceLevelAgreement with
updated README