Merge branch '2.0.0' of tasktools.org:task into 2.0.0

EXPOSITION

@@ -0,0 +1,59 @@
+Startup
+  On startup, main creates a global Context object, then calls the
+  Context::initialize and Context::run methods.
+
+  Context is a large object that holds all task information, both in terms of
+  the task data, and intermediate run-time data.  Having one global Context
+  object means we don't have 50 global variables.  Context is therefore just a
+  big bucket of data.
+
+  Context::initialize sets up all the data and processes the command line.  The
+  initialization process is a big chicken-and-egg problem, because the command
+  line depends on configuration (aliases) and the command line can force a
+  reload of configuration (rc:foo).  This is solved by look-ahead: the command
+  line is scanned for 'rc:xxx' and 'rc.data.location:xxx' arguments, then later
+  for overrides.
+
+  The Context::run method handles all the debug output and exceptions.  Its
+  main purpose is to set up exception handling and call Context::dispatch.
+
+
+Command Line Parsing
+  Command line parsing is difficult because of all the ambiguity.  The solution
+  is to make several passes over the command line.  For example, the task
+  command determines whether subsequent arguments are interpreted as part of a
+  filter or set of modifications.
+
+
+
+Dispatch
+  Dispatch is simple:  once the command line is parsed, the command is used to
+  look up a command object, then call its execute method.
+
+  Context stores an associative map of command object pointers indexed by a
+  string.  This means the 'done' string is an index to the CmdDone object that
+  implements the functionality.
+
+
+
+Command Objects
+
+
+Column Objects
+
+
+GC
+
+
+TDB2
+
+
+Filter
+
+
+Sorting
+
+
+Render
+
+

test/ANALYSIS

@@ -2,7 +2,7 @@
 FH month and year are treated as IDs
 
 * project.t
-PB problem known, disabled output (???)
+PB There is a bug in the calculation
 
 * text.t
 PB need to use a UTF-8 friendly way of doing input[--eol].
@@ -18,4 +18,10 @@ FH merge fails because of missing undo.data in data dirs.
 FH 'task info' shows tasks from the completed.data file when doing a filter on the ID
    could it be confused and interpretes this as an UUID
 
+* uuid.t
+PB There is a (likely) timezone problem in uuid.t that causes an off-by-one day
+   problem that we have seen before.
+
+* bug.concat.t
+PB The word 'original' is parsed as 'or'(operator) ' '(space) 'iginal'(word).