Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contribution
 
-`Morphos` are open for additions and improvements.
+`Morphos` is open for additions and improvements.
 
 Addition a new language is simple: create the class inheriting one of basic classes and realize abstract methods from it.
 
@@ -9,9 +9,9 @@ Here is a list of basic abstract classes:
 #### `morphos\NamesDeclensions`
 Class for names declension.
 
-* `abstract public function isMutable($name, $gender)` - Checks, whether there are rules for this name.
-* `abstract public function getCases($name, $gender)` - Generates all cases of a name.
-* `abstract public function getCase($name, $form, $gender)` - Generates one case of a name.
+* `public function isMutable($name, $gender)` - Checks, whether there are rules for this name.
+* `public function getCases($name, $gender)` - Generates all cases of a name.
+* `public function getCase($name, $form, $gender)` - Generates one case of a name.
 
 #### `morphos\GeneralDeclension`
 
@@ -23,18 +23,17 @@ Class for names declension.
 
 * `public function getCases($number)` - Generates all cases for a number.
 * `public function getCase($number, $case)` - Generates one case for a number.
-* `static public function generate($number)` - Generates nominative numeral for a number.
 
 ### String helper
 Morphos distributed with a string helper supporting multibyte encodings. Class is `morphos\S`.
 
 It has following static methods:
 
-1. `set_encoding()` - Sets encoding for using in all functions.
-2. `length()` - Calculates count of characters in string.
-3. `slice()` - Slices string like python.
-4. `lower()` - Lower case.
-5. `upper()` - Upper case.
-6. `name()` - Name case. (ex: Thomas Lewis)
-7. `chars_count()` - Count of few chars.
-8. `last_position_for_one_of_chars()` - Finds last position for one of chars.
+- `set_encoding($enc)` - Sets encoding for using in all functions.
+- `length($string)` - Calculates count of characters in string.
+- `slice($string, $start, $end = null)` - Slices string like "[:]" in python.
+- `lower($string)` - Lower case.
+- `upper($string)` - Upper case.
+- `name($string)` - Name case. (ex: Thomas Lewis)
+- `chars_count($string, array $chars)` - Count of few chars.
+- `last_position_for_one_of_chars($string, array $chars)` - Finds last position for one of chars.