minor irritation -Wdefaulted-function-deleted warning...

[oschonrock]

clang++ --version
clang version 8.0.0-3 (tags/RELEASE_800/final)
Target: x86_64-pc-linux-gnu

gives these with latest master.

clang++ -O2  -Wall -Wshadow -std=c++17 -o build/corr corr.cpp -lpthread
In file included from corr.cpp:3:
/home/oliver/c/leet/include/csv.hpp:4151:9: warning: explicitly defaulted move constructor is implicitly deleted [-Wdefaulted-function-deleted]
        CSVReader(CSVReader&&) = default;     // Move constructor
        ^
/home/oliver/c/leet/include/csv.hpp:4302:20: note: move constructor of 'CSVReader' is implicitly deleted because field 'feed_lock' has a deleted move constructor
        std::mutex feed_lock;                /**< Allow only one worker to write */
                   ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/std_mutex.h:97:5: note: 'mutex' has been explicitly marked deleted here
    mutex(const mutex&) = delete;
    ^
In file included from corr.cpp:3:
/home/oliver/c/leet/include/csv.hpp:4153:20: warning: explicitly defaulted move assignment operator is implicitly deleted [-Wdefaulted-function-deleted]
        CSVReader& operator=(CSVReader&& other) = default;
                   ^
/home/oliver/c/leet/include/csv.hpp:4302:20: note: move assignment operator of 'CSVReader' is implicitly deleted because field 'feed_lock' has a deleted move assignment operator
        std::mutex feed_lock;                /**< Allow only one worker to write */
                   ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/std_mutex.h:98:12: note: 'operator=' has been explicitly marked deleted here
    mutex& operator=(const mutex&) = delete;
                                                                                                                    

-Wno-defaulted-function-deleted suppresses them obviously.

[vincentlaucsb]

Fixed by PR #78