Latvian language improvements.

Reorganized wovel/consonant groups, more rules for wide/narrow e and ē. Few updates for o's.

dictsource/lv_list

 // Spelling-to-phoneme words for Latvian
 
 // names of Latvian letters
-a   ''a_:: 
+a   ''a_: 
 ā   'a::_!
-b   b'E:_:
-c   ts'E:_:
-č   tS'E:_:
-d   d'E:_:
-e   ''E_::
-ē   'E::_!
-f   'Ef:_::
+b   b'e:_:
+c   ts'e:_:
+č   tS'e:_:
+d   d'e:_:
+e   ''e_:
+ē   'e::_!
+f   'ef:_:
 g   g'a:_:
-ģ   J'E:_:
+ģ   J'e:_:
 h   h'a:_:
-ḩ   h'E:_:
-i   ''i_::
+ḩ   h'e:_:
+i   ''i_:
 ī   'i::_!
-j   j'E:_:
+j   j'e:_:
 k   k'a:_:
-ķ   c'E:_:
-l   'El:_::
-ļ   'El^:_::
-m   'Em:_::
-n   'En:_::
-ņ   'En^:_::
-o   'uo_::
-ō   'o:::_!
+ķ   c'e:_:
+l   'el:_:
+ļ   'el^:_:
+m   'em:_:
+n   'en:_:
+ņ   'en^:_:
+o   'uo_:
+ō   'o::_!
 p   p'e:_:
 q   k'u:_:
-r   'eR::_:
-ŗ   'Er::_:
-s   'es::_:
-š   'ES::_:
+r   'eR::_!
+ŗ   'er::_!
+s   'es::_!
+š   'eS::_!
 t   'te:_:
-u   ''u_::
-ū   'u:::_!
-v   v'E:_:
+u   ''u_:
+ū   'u::_!
+v   v'e:_:
 w   d'ubv,e:_:
 x   'iks_:
 y   'ig,Rek_:
-z   z'E:_:
-ž   Z'E:_:
+z   z'e:_:
+ž   Z'e:_:
 
 //  diphthong consonants
 dz      dze:
 aerofoto        $alt
 aidaho  $alt
 aikido  $alt
+ambo    $alt
 anno    $alt
 automoto        $alt
 bandžo  $alt
 majordomo       $alt
 mecotinto       $alt
 mehiko  $alt
+meteo   $alt
 metro   $alt
 microsoft       $alt
 monako  $alt
 montekarlo      $alt
 montevideo      $alt
 moto    $alt
+nato    $alt
 odo     $alt
 ohaio   $alt
 oho     $alt