Make getting Uni seq/cp's case insensitive and add seq from NamedSequ…

…ences.txt

This makes looking up codepoints or sequences by name case insensitive. We store them
all in uppercase when generating the Unicode database and then uppercase any requests we
receive before trying to look them up.

This also adds the sequences from NamedSequences.txt, previously only the Emoji Sequences
and Emoji ZWJ Sequences were in our database.

This also fixes an issue where some of the Emoji sequences used commas which caused a
conflict with standard notation which seperates codepoints by commas, in Perl 6 this would be:
"\c[NUMBER SIGN, COMMA]" which would output: #,