fixed issuer #4, version string missing, and added some docs about pattern syntax

Makefile

@@ -26,7 +26,7 @@ GID     = 0
 BRANCH  = $(shell git describe --all | cut -d/ -f2)
 COMMIT  = $(shell git rev-parse --short=8 HEAD)
 BUILD   = $(shell date +%Y.%m.%d.%H%M%S) 
-VERSION:= $(if $(filter $(BRANCH), development),$(version)-$(BRANCH)-$(COMMIT)-$(BUILD))
+VERSION:= $(if $(filter $(BRANCH), development),$(version)-$(BRANCH)-$(COMMIT)-$(BUILD),$(version))
 
 
 all: $(tool).1 cmd/$(tool).go buildlocal

cmd/tablizer.go

@@ -24,10 +24,10 @@ SYNOPSIS
 DESCRIPTION
     Many programs generate tabular output. But sometimes you need to
     post-process these tables, you may need to remove one or more columns or
-    you may want to filter for some pattern or you may need the output in
+    you may want to filter for some pattern (See PATTERNS) or you may need
-    another program and need to parse it somehow. Standard unix tools such
+    the output in another program and need to parse it somehow. Standard
-    as awk(1), grep(1) or column(1) may help, but sometimes it's a tedious
+    unix tools such as awk(1), grep(1) or column(1) may help, but sometimes
-    business.
+    it's a tedious business.
 
     Let's take the output of the tool kubectl. It contains cells with
     withespace and they do not separate columns by TAB characters. This is
@@ -73,6 +73,30 @@ DESCRIPTION
     Finally the -d option enables debugging output which is mostly usefull
     for the developer.
 
+  PATTERNS
+    You can reduce the rows being displayed by using a regular expression
+    pattern. The regexp is PCRE compatible, refer to the syntax cheat sheet
+    here: <https://github.com/google/re2/wiki/Syntax>. If you want to read a
+    more comprehensive documentation about the topic and have perl installed
+    you can read it with:
+
+        perldoc perlre
+
+    Or read it online: <https://perldoc.perl.org/perlre>.
+
+    A note on modifiers: the regexp engine used in tablizer uses another
+    modifier syntax:
+
+        (?MODIFIER)
+
+    The most important modifiers are:
+
+    "i" ignore case "m" multiline mode "s" single line mode
+
+    Example for a case insensitve search:
+
+        kubectl get pods -A | tablizer "(?i)account"
+
   OUTPUT MODES
     There might be cases when the tabular output of a program is way too
     large for your current terminal but you still need to see every column.

tablizer.1

@@ -162,12 +162,12 @@ tablizer \- Manipulate tabular output of other programs
 .Ve
 .SH "DESCRIPTION"
 .IX Header "DESCRIPTION"
-Many  programs generate  tabular  output.  But  sometimes  you need  to
+Many  programs generate  tabular output.   But sometimes  you need  to
 post-process these tables, you may need  to remove one or more columns
-or you may want to filter for  some pattern or you may need the output
+or you  may want to filter  for some pattern (See  \s-1PATTERNS\s0) or you
-in another program and need to  parse it somehow.  Standard unix tools
+may need the  output in another program and need  to parse it somehow.
-such as  \fBawk\fR\|(1), \fBgrep\fR\|(1) or \fBcolumn\fR\|(1)  may help, but sometimes  it's a
+Standard unix tools such as \fBawk\fR\|(1), \fBgrep\fR\|(1) or \fBcolumn\fR\|(1) may help, but
-tedious business.
+sometimes it's a tedious business.
 .PP
 Let's take  the output of  the tool  kubectl.  It contains  cells with
 withespace and they do not separate columns by \s-1TAB\s0 characters. This is
@@ -220,6 +220,38 @@ The numbering can be suppressed by using the \fB\-n\fR option.
 .PP
 Finally the  \fB\-d\fR option  enables debugging  output which  is mostly
 usefull for the developer.
+.SS "\s-1PATTERNS\s0"
+.IX Subsection "PATTERNS"
+You can reduce the rows being  displayed by using a regular expression
+pattern.  The  regexp is  \s-1PCRE\s0 compatible, refer  to the  syntax cheat
+sheet here: <https://github.com/google/re2/wiki/Syntax>.  If you want
+to read  a more comprehensive  documentation about the topic  and have
+perl installed you can read it with:
+.PP
+.Vb 1
+\&    perldoc perlre
+.Ve
+.PP
+Or read it online: <https://perldoc.perl.org/perlre>.
+.PP
+A note on  modifiers: the regexp engine used in  tablizer uses another
+modifier syntax:
+.PP
+.Vb 1
+\&    (?MODIFIER)
+.Ve
+.PP
+The most important modifiers are:
+.PP
+\&\f(CW\*(C`i\*(C'\fR ignore case
+\&\f(CW\*(C`m\*(C'\fR multiline mode
+\&\f(CW\*(C`s\*(C'\fR single line mode
+.PP
+Example for a case insensitve search:
+.PP
+.Vb 1
+\&    kubectl get pods \-A | tablizer "(?i)account"
+.Ve
 .SS "\s-1OUTPUT MODES\s0"
 .IX Subsection "OUTPUT MODES"
 There might be cases  when the tabular output of a  program is way too