Add MD5, Perf Support and parse the values

[vibhoothi]

This PR adds frontend and server changes for

• MD5Sum for EncodeJob
• This also moves to parse the texts with help of genfromtxt instead of loadtxt as we have non-numerical entries in daala.out and for BDR computation, we ignore them.
• Perf Support, workers require to have them installed, and runners should have non-root support for using perf stat, can enable that using sudo sh -c 'echo 1 >/proc/sys/kernel/perf_event_paranoid', we need this for measuring,
  • Encoding, Decoding Cycles
  • Encoding, Decoding Instruction Count
• CSV_Export:
  • Fixes a bug in All Preset option which was parsed in wrong way where the task was not updated
  • Fixes a bug where custom QP was not written to CSV_file
• Clarified frontend to be more explicit to say AOM-CTC, since we have other CTC support.

[vibhoothi]

Relevant rd_tool: https://github.com/xiph/rd_tool/pull/129