convert Fitnesse hash table to Powershell hash table

[DellHenryHan]

function Set-Script($s, $fmt){
  if(!$s){ return }
  $s = $s -replace '<table class="hash_table">\r\n', '@{' -replace '</table>','}' -replace '\t*<tr class="hash_row">\r\n','' -replace '\t*</tr>\r\n','' -replace '\t*<td class="hash_key">(.*)</td>\r\n', '''$1''=' -replace '\t*<td class="hash_value">(.*)</td>\r\n','''$1'';'

Why are the keys and values in single quotes after converted to powershell hash table? It would be better when we remove those single quotes, so that we can use more types of variables in hash table other than String without conversion, such as Array and Hashtable:
|script|
|testScenario|!{field1:!-@{a=1;b=2}-!,field2:!-"item1","item2","item3"-!}|

[konstantinvlasenko]

Can you create a pull request with proposed fix and test?