Add support for more language functions

Hi,
these are all language functions which does PTS plugin suport?

    __('...')

    _e('...')

Because in WordPress, there is a lot of more lang. functions where the strings can be stored:

__
_e
__ngettext:1,2
_n:1,2
__ngettext_noop:1,2
_n_noop:1,2
_c
_nc:4c,1,2
_x:1,2c
_nx:4c,1,2
_nx_noop:4c,1,2
_ex:1,2c
esc_attr__
esc_attr_e
esc_attr_x:1,2c
esc_html__
esc_html_e
esc_html_x:1,2c