Added Russian translation

[EricKotato]

Even though there is not much of text, I think it's good to have translations. This PR adds support for Russian translation.

Since git can't interpret UTF-16 LE with BOM as text, I'm providing its text here:

[MCM_OptionsMenuListener]
m_strModMenuButton="НАСТРОЙКИ МОДОВ"

[MCM_OptionsScreen]
m_strSaveAndExit="Сохр. и выйти"
m_strCancel="Отмена"
m_strTitle="Настройки модов"
m_strSubtitle=""

[MCM_SettingsPanel]
m_strResetButton="Сброс"
m_strRevertButton="Отменить"
m_strApplyButton="Сохранить"

If there is any workaround to store translation as text acceptable for git and converting it to UTF-16 LE with BOM afterwards, that would be great.

[andrewgu]

Thanks for taking the time to suggest translations. I will review/test it in a couple weeks when my day job calms down.