add list of ignored files

remove typos

fix typos

add draft of a README

add license file

add missing -pthread

improvements in loadtool (argument handling), minor changes

integrated SQL output mode for sqlplot

new test program: compare and improve sorting algorithms for multi core

improved rdtsc handling (64 and 32 bit, -O3 secure, no warnings)

some fixes for 32 bit systems

* moved RDTSC() macro to tools.h

* moved global options & information into structs instead of separate variables

stupid typo...