created models for bead data and metadata
added views, api views, and serializers for BeadSample
unified various ng services
added panel_type filter for SitePanel API
start bead upload app w/custom site panel creator
add validation rules for bead parameters
changed BeadSample field 'signal_channel' to 'compensation_channel', added POST API view/serializer for bead sample
fix accidental re-factoring of fcs upload app URLs
remove unused fields from bead upload app
move compensation channel select with other categorization selects
BUGFIX: typos and wrong relations in BeadSample model
more cleanup of unused attributes and added site panel change event
added bead detail api view / serializer
limit panels in bead upload app to bead panels
add staining filter to project panel list api
limit project panels to bead panels when creating new bead site panels
limit project panels to non-bead panels when for creating non-bead site panels
update site panel query param for 'project'
update angular: 1.2.14 -> 1.2.16
simplify REST api URL params by getting rid of double underscores