UK & Guinea plausibility/ncd list fixes

* UK's mobile ndc listing just happened to mostly work by luck (the 1.8
compatibility around splats)
* I originally based Guinea's around that code on the incorrect
assumption it was actually proper
* Also removed the `fixed(n)` cases from UK and Guinea for better
plausibility testing.

Interesting note: Ofcom (the UK body that administers phone number
assignment) has lists of all the allocated ndcs and their number lengths
(e.g. 4+5 vs 4+6 vs mixed) that are supposedly updated weekly. When
making the `fixed(n)` => `none` change for the UK, I ran a hacked
together test case that ran through every allocation and tested
plausibility. So now +44 numbers aren't considered plausible simply by
being 10 digits long (excluding country code). :D
dutch 0800 and 0900 numbers can be followed by 4 or 7 digits. http://nl.wikipedia.org/wiki/Informatienummer#Nummerlengte
be somewhat less strict about UK & Guinea plausibility, remove extra to_a
Merge pull request #198 from Emily/various_plausibility_fixes_for_uk_and_guinea

UK & Guinea plausibility/ndc list fixes
Merge pull request #199 from gerard-leijdekkers/improve_dutch_service_numbers

dutch 0800 and 0900 numbers can be followed by 4 or 7 digits. http://nl....
2.8.3
Add pippi for fun.
Use a 3,4 split for Greek mobile numbers

- according to http://www.itu.int/dms_pub/itu-t/oth/02/02/T02020000550001MSWE.doc, the formatting for mobile numbers
  follows a 3,4 split. e.g. +30 693 XXX XXXX
- this is also how mobile numbers are listed in the Non-geographic numbers section of the wiki http://en.wikipedia.org/wiki/Telephone_numbers_in_Greece
Merge pull request #200 from tpena/enhancement/Greece-mobile-splitting

Use a 3,4 split for Greek mobile numbers
Austrian mobile numbers can have 7-10 digits in the subscriber number

As listed in the table on page 17 of the Austrian ITU document https://www.rtr.at/en/tk/E129/2312_Austrian_Numbering_Plan_2011-03-30.pdf
a mobile number can be between 7 and 10 digits in the subscriber number. This is also something we noticed with some of our customers
as well.
Adapted Slovenian rule matching based on ITU and Twiki info

Page 1 of the ITU document http://www.itu.int/oth/default.aspx?lang=en&parent=T02020000BE indicates the
possible structures of the National (Significant) Numbers. We used this information, with the focus on
mobile numbers, to fix up the parsing rules. Furthermore, the maximum length of the NSN is 8 digits whic
meant that the previous parsing rule (fixed(2) >> split(3, 2, 2)) would not return the correct plausibility
results for valid numbers.

Added plausibility as well as formatting specs.
Split Italian mobile numbers into 3,4 chunks but allow the subscriber length to range from 6-8 digits.

The standard length of mobile numbers is 10 digits (3 + t subscriber), but as outlined here
http://en.wikipedia.org/wiki/Telephone_numbers_in_Italy#Mobile_telephones, there are 6-digit subscriber numbers
as well as 11. The ITU document for Italy, http://www.itu.int/dms_pub/itu-t/oth/02/02/T020200006B0001PDFE.pdf,
also touches on this on page 14 listing that the minimum number of digits for a mobile number is 9 (here they refer
to ndc + subcriber). Moreover, we also have users with these 9-digit numbers, which is how we actually stumbled
across this problem in the first place.
Extended Estonia number parsing to accept mobile numbers in the 5xx range to have a length of 7 or 8.

The ITU document on Estonia, http://www.itu.int/dms_pub/itu-t/oth/02/02/T02020000430001PDFE.pdf, indicates on
page 4 that the number range 50-59 contains 8 digits, however, if you look at http://en.wikipedia.org/wiki/Telephone_numbers_in_Estonia
and https://www.numberingplans.com/?page=plans&sub=phonenr&alpha_2_input=EE&current_page=69, it appears that this is not
entirely correct. the 5xx range can be either 7 or 8 digits long and this is something that we are also seeing with some of our
clients.

Now to be fair to the ITU document, as an additional remark, it states the following.

"Differences in § 19 section 1 of the “Estonian Numbering Plan” Regulation, Mobile telephone service"

I am not sure what other document this is referring to as the § 19 section 1 is not part of the one pointed to by the aforementioned link.
In either case, given the other sources of information along with some of our clients, it seems that the 7/8 digit is something that
needs to be taken into account.
Merge pull request #201 from tpena/enhancement/Slovenia-number-length

Adapted Slovenian rule matching based on ITU and Twiki info
Merge pull request #202 from tpena/enhancement/Austria-mobile-length

Austrian mobile numbers can have 7-10 digits in the subscriber number
Merge pull request #203 from tpena/enhancement/Italian-mobile-numbers

Split Italian mobile numbers into 3,4 chunks but allow the subscriber le...
Merge pull request #204 from tpena/enhancement/Estonian-mobile-numbers

Extended Estonia number parsing to accept mobile numbers in the 5xx rang...
Merge branch 'master' of github.com:floere/phony
2.8.4
Adding support for extended service numbers in Germany (0800 with up to 13 digits in total)