String table identifiers calculation issue

String tables identifiers calculated now using UTF-8 encoded binary
array size instead of string size because we store string in PE file as
encoded bytes.
Unclosed exception block descriptor

Sometimes Mono.Cecil doesn't fill value for exception catching block
last instruction - in this case last method instruction is assumed now.
Attributes filtering at method/field/type level

New attributes filtering list introduced at types/fields/methods level
and list of ignored attributes extended with some compile-time specific
and not supported at run-time attributes.