added ip type to documentation
improved docs about ip type
update crash to 0.9.14
add proper cleanup do docs build file
try to fix InformationSchemaTest flakyness
Merge pull request #980 from crate/m/crash_update

update crash to 0.9.14
add the round scalar function
add the ceil scalar function
added random function
added abs scalar function
add the floor function
added square root scalar function
fix test suite
fixed SquareRootFunction type check test
implemented scalar function log(x), log(b,x) and ln(x)
mathematical functions: null handling
mathematical functions: fix docu (typos, correct rendering), alphabetical order.
base is now the 2nd argument of LogFunction instead of 1st
mathematical functions: log: clean tests
add generic numeric scalar search filter script in order to allow arithmetic functions in where clause