Fix duplicate entries in CITIES hash

[stefan-schindler]

Fixes tha warnings regarding duplicated keys in CITIES HASH, by concatenating the values of duplicate keys (or by removing duplicate entries).

/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:151: warning: key "027" is duplicated and overwritten on line 152
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:153: warning: key "028" is duplicated and overwritten on line 154
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:154: warning: key "028" is duplicated and overwritten on line 155
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:172: warning: key "060" is duplicated and overwritten on line 173
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:175: warning: key "062" is duplicated and overwritten on line 176
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:186: warning: key "072" is duplicated and overwritten on line 187
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:206: warning: key "100" is duplicated and overwritten on line 207
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:216: warning: key "109" is duplicated and overwritten on line 217
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:246: warning: key "138" is duplicated and overwritten on line 247
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:249: warning: key "150" is duplicated and overwritten on line 250
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:252: warning: key "152" is duplicated and overwritten on line 253
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:256: warning: key "155" is duplicated and overwritten on line 257
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:260: warning: key "158" is duplicated and overwritten on line 261
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:264: warning: key "161" is duplicated and overwritten on line 265
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:266: warning: key "162" is duplicated and overwritten on line 267
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:270: warning: key "165" is duplicated and overwritten on line 271
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:273: warning: key "167" is duplicated and overwritten on line 274
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:275: warning: key "168" is duplicated and overwritten on line 276
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:282: warning: key "180" is duplicated and overwritten on line 283
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:283: warning: key "180" is duplicated and overwritten on line 284
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:284: warning: key "180" is duplicated and overwritten on line 285
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:285: warning: key "180" is duplicated and overwritten on line 286
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:286: warning: key "180" is duplicated and overwritten on line 287
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:287: warning: key "180" is duplicated and overwritten on line 288
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:288: warning: key "180" is duplicated and overwritten on line 289
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:289: warning: key "180" is duplicated and overwritten on line 290
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:290: warning: key "180" is duplicated and overwritten on line 291
/Users/stefan/Documents/Repos/My/clabe/lib/clabe.rb:291: warning: key "180" is duplicated and overwritten on line 292
...