added tentative replacement for PSP fit functions:
  - parameters are now bounded
  - uses rise power = 2.0 by default
  - fixed some bugs in the estimation process
merge from dev
merge from kratz
added time-to-peak and length-over-decay measurements to PSP analysis
UI fixes for histogram LUT
merge from dev
- adjusted tick spacing/opacity for AxisItem
- histogramLUT has better autoscaling behavior
- fixed auto-range for linearRegionItem
merge from luke
bug fix - hdf5 files are explicitly closed after being read
added riseTime and riseSlope measurements to event fitter
various small bugfixes for pyqtgraph
added export options for tablewidget
bugfixes
logwindow pops up error messages
small config fix
doc update
fixes for mosaic editor -- close atlas correctly
moved atlas builder to better home
bugfix
File loader now raises an exception if you ask for the selected file and one is not selected