Added Date & Time emulation
Added .gitignore file
renamed SFLDateTimeTest to SFLDateTimeTests
Added common trigger test class
updated SFLLogCleaner for working in unit test context.
Added new portion of Utility classes.
 - Added testing utils for enabling dateTime emulation
 - Added notification utility(DRAFT)
Merge branch 'master' of https://github.com/pavel-slepenkov/SFLogger.git