Re-design output to make skimming easier.

- We now always protect the left margin when printing task details
  (including tags) to make it easier to skim down that line.
- Also made the actual summary always follow immediately after the ID,
  to align to that skimmable line.
- Moved the information about the delegatee to the end of the summary,
  next to the tags, and changed the color of the delegatee to make it
  easier to distinguish.
- Added the `-G` option, to allow filtering out issues matching any of
  the provided tags.
- We now allow options to be passed to both the `delegate` and `help`
  command. Any options are ignored, but this allows the use of tools
  like `cmd_shell` which always wrap commands with the pre-given
  options.

src/pitpkg/private/libpit.nim

@@ -1,5 +1,6 @@
-import cliutils, docopt, json, logging, langutils, options, os,
-  sequtils, strformat, strutils, tables, times, timeutils, uuids
+import std/json, std/logging, std/options, std/os, std/sequtils, std/strformat,
+  std/strutils, std/tables, std/times
+import cliutils, docopt, langutils, timeutils, uuids
 
 import nre except toSeq
 
@@ -23,6 +24,7 @@ type
     completedRange*: Option[tuple[b, e: DateTime]]
     fullMatch*, summaryMatch*: Option[Regex]
     hasTags*: seq[string]
+    exclTags*: seq[string]
     properties*: TableRef[string, string]
     exclProperties*: TableRef[string, seq[string]]
 
@@ -115,6 +117,7 @@ proc initFilter*(): IssueFilter =
     fullMatch: none(Regex),
     summaryMatch: none(Regex),
     hasTags: @[],
+    exclTags: @[],
     properties: newTable[string, string](),
     exclProperties: newTable[string,seq[string]]())
 
@@ -372,6 +375,9 @@ proc filter*(issues: seq[Issue], filter: IssueFilter): seq[Issue] =
   for tag in filter.hasTags:
     result = result.filterIt(it.tags.find(tag) >= 0)
 
+  for exclTag in filter.exclTags:
+    result = result.filterIt(it.tags.find(exclTag) < 0)
+
 ### Configuration utilities
 proc loadConfig*(args: Table[string, Value] = initTable[string, Value]()): PitConfig =
   let pitrcLocations = @[