Extract, move and test StrToInt64

[dexX7]

This basically breaks down #173.

• Rename strtToInt64 to StrToInt64
• Moved into new files /mastercore/parse_string.h and /mastercore/parse_string.cpp
• Adopted and converted @zathras-crypto's tests to BOOST tests which can be run via ./src/test/test_bitcoin
• Namespace "mastercore" is used
• I tend to let this sit in it's own file, because it's only used in mastercore_rpc and sendmpdialog whereby Format__MP is used in other places

Build and practical tests done.

[m21]

@zathras-crypto comments please?
I am kinda against creating a subdirectory for mastercore at this time Dexx:
1 = makes #including harder for QT
2 = we only have a handful of files
3 = 1 more reason I can't yet discuss

[dexX7]

I see. Are you fine with "mastercore_strtoint64.h" and "mastercore_strtoint64.cpp"? The only other functions at the moment that may qualify for a combined file are the Format_MP and rounduint64, but all three have very different dependencies and scopes (at least in practise), so I tend to single purpose files. What do you think?

I'm curious now.. :p mind to send me an email to dexx@bitwatch.co re: 3? ;)

[m21]

Heh sorry.
Maybe: mastercore_util or mastercore_strutil?

[dexX7]

Rebased, for now it's still in mastercore_parse_string. Hmm.. util is sort of generic and doesn't tell much.