Added standard Polish keymap.

source: https://github.com/kernc/logkeys/issues/123

keymaps/pl.map

+<Esc>
+1 ! ¹
+2 @ ²
+3 # ³
+4 $ ¼
+5 % ½
+6 ^ ¾
+7 & {
+8 * [
+9 ( ]
+0 ) }
+- _ \
+= + ¸
+<BckSp>
+<Tab>
+q Q @
+w W ł
+e E ę
+r R ¶
+t T ŧ
+y Y ←
+u U ↓
+i I →
+o O ó
+p P þ
+[ { ¨
+] } ~
+<Enter>
+<LCtrl>
+a A ą
+s S ś
+d D ð
+f F đ
+g G ŋ
+h H ħ
+j J j
+k K ĸ
+l L ł
+; : ´
+' " ^
+` ~ ¬
+<LShft>
+\ | `
+z Z ż
+x X ź
+c C ć
+v V “
+b B ”
+n N ń
+m M µ
+, <
+. > ·
+/ ?
+<RShft>
+<KP*>
+<LAlt>
+ 
+<CpsLk>
+<F1>
+<F2>
+<F3>
+<F4>
+<F5>
+<F6>
+<F7>
+<F8>
+<F9>
+<F10>
+<NumLk>
+<ScrLk>
+<KP7>
+<KP8>
+<KP9>
+<KP->
+<KP4>
+<KP5>
+<KP6>
+<KP+>
+<KP1>
+<KP2>
+<KP3>
+<KP0>
+<KP.>
+Ą
+<F11>
+<F12>
+<KPEnt>
+<RCtrl>
+<KP/>
+<PrtSc>
+<AltGr>
+<Break>
+<Home>
+<Up>
+<PgUp>
+<Left>
+<Right>
+<End>
+<Down>
+<PgDn>
+<Ins>
+<Del>
+<Pause>
+<LMeta>
+<RMeta>
+<Menu>