Update report.tex
Wrote some stuff about the algorithms we intend to implement

I focused more on the modular exponentiation than on the big integer arithmetic,
since I'm more familliar with that topic.
added verification section

+ added name of bitwise exponentiation algo
Added group number to authors line
Added timers around calls to the crypto functions in libgcrypt, to get performance data.
Merge remote-tracking branch 'onasafari/master'
Header files for c implementation
modExpt implemented, plus functions for equality testing, and setting to 0
Implemented shiftL and shiftR
Added functions for reading and writing bigints from and to file descriptors.
Tested and debugged a bunch of stuff

Tested and debugged util functions, shiftL, shiftR, equal, clearBigint, and assign.
Quick bug fix for shiftR