Allow 64 chars on WiFi key; add fonts; font selector from user_override

[nagyrobi]

...on branch 0.4.0 too...

[nagyrobi]

So this is how it works:

• it will build like before if you don't thouch user_config_override
• if you uncomment #define USE_BASIC_FONTS it will use basic versions with Latin1 +basic symbols and no FontAwesome, sizes 12, 16, 22, 28
• if you additionally uncomment #define USE_BASIC_HU (or RO) it will use Latin1 +basic symbols +Hungarian (or Romanian) and no FontAwesome, sizes 12, 16, 22, 28
• if you uncomment #define USE_FONTAWESOME_SEPARATE it will include FontAwesome symbols in size 26
• if you uncomment #define USE_EXTRA_BIGNUMBERS it will include numbers and punctuation only in size 44

To use the separate FontAwesome you just need to specify it's size (26), same for bignumbers (44).

[fvanroie]

I already ported the changes from master to 0.4.0-dev

[fvanroie]

The fonts part will need rework as splitting the characters out is not something that is user-friendly and makes the code harder to maintain.