Fix trace start/end regex

Appears to be a tab between "END ["
Add Trace record; Store start/end time

In zipper, store the start & end time of trace at root node.

xdebug-trace.reader/read-trace returns a Trace record

WIP on displaying this on front-end
Include file in Trace record

Modify trace reader workflow to include File in returned Trace record
Add note to top-n-by docstring
Trivial renaming

"comp" continues to confuse me with clojure.core/comp
Contain trace's name within the record

Clunky to pass around string name for trace when it can be derived from file.

Access the trace's name from a method on the trace/file.
Store trace time as integer timestamp
Display trace duration