Add Option for Dropping Leading H1 Heading (#36)

* Add goland IDE prefs to .gitignore

* Add flag for removing leading H1 heading in markdown; fixes #35

* Remove manpage reference to unused -n and -c args

* Add manpage docs for --drop-h1 argument

* Update docs; add docs for --drop-h1 argument

* Rename method to be more verbose; add code comments

Renames to `DropDocumentLeadingH1` to better denote the method's
purpose and adds code docs to this effect in order to hopefully
negate potential misuse on single lines.

* Revert "Add manpage docs for --drop-h1 argument"

This reverts commit 48a641baed.

The `--drop-h1` flag is not understood as an argument in this
context, but rather is folded under `[options]`. This change
caused the arguments to not be properly parsed when the --drop-h1
flag was passed.

main.go

@@ -108,7 +108,6 @@ By default, mark provides several built-in templates and macros:
 Usage:
   mark [options] [-u <username>] [-p <token>] [-k] [-l <url>] -f <file>
   mark [options] [-u <username>] [-p <password>] [-k] [-b <url>] -f <file>
-  mark [options] [-u <username>] [-p <password>] [-k] [-n] -c <file>
   mark -v | --version
   mark -h | --help
 
@@ -123,6 +122,7 @@ Options:
   -f <file>            Use specified markdown file for converting to html.
   -k                   Lock page editing to current user only to prevent accidental
                         manual edits over Confluence Web UI.
+  --drop-h1            Don't include H1 headings in Confluence output.
   --dry-run            Resolve page and ancestry, show resulting HTML and exit.
   --compile-only       Show resulting HTML and don't update Confluence page content.
   --debug              Enable debug logs.
@@ -143,6 +143,7 @@ func main() {
 		compileOnly   = args["--compile-only"].(bool)
 		dryRun        = args["--dry-run"].(bool)
 		editLock      = args["-k"].(bool)
+		dropH1        = args["--drop-h1"].(bool)
 	)
 
 	if args["--debug"].(bool) {
@@ -286,6 +287,11 @@ func main() {
 
 	markdown = mark.CompileAttachmentLinks(markdown, attaches)
 
+	if dropH1 {
+		log.Info("Leading H1 heading will be excluded from the Confluence output")
+		markdown = mark.DropDocumentLeadingH1(markdown)
+	}
+
 	html := mark.CompileMarkdown(markdown, stdlib)
 
 	{