Add lifetime for standard lifetime

[aksagar]

To assert the reliability of SLIM plugin as a viable Lifetime image analysis tool, we need to add the data of lifetime value calculated from standard lifetime sample. Standard samples like HPTS(2.5ns), YG Beads(2.2-2.3ns), HPTS(5.4ns), fluorescein(4.0ns) are used by biologists to test the accuracy of a system and analysis software. Analyzing those images with SLIM plugin, and adding those data to the wiki page will be incredible source for reliability for SLIM Plugin