Tanks: Avoidance Diminishing Returns tweaks
-consistency: now all found in init_base_stats()
-updated values based on latest testing, esp. monks
-changed parry_rating_per_strength to parry_per_strength as it no longer gives rating
-prepared for removal of antiquated dodge per agility data in sc_extra_data.inc

git-svn-id: http://simulationcraft.googlecode.com/svn/trunk@17168 3b4652a1-8050-0410-ac47-3d40261b0f8b
DBC: Removal of outdated (and inaccurate) dodge_per_agi and base dodge tables
- base dodge is 3.0 for all classes/races/levels, so no need for a base dodge table
- dodge_per_agi tables were inaccurate, not updated. Returned values were overwritten with hardcoded lvl 90 values in tank modules anyway. 
-it would be a giant pain to provide accurate avoidance formulas at <90 unless we can extract the agi->dodge, str->parry, base agi, base str conversions from MPQ files.  Not worth trouble.

git-svn-id: http://simulationcraft.googlecode.com/svn/trunk@17169 3b4652a1-8050-0410-ac47-3d40261b0f8b