Sped up rbenv startup times.

Rbenv attempts to rehash EVERY gem on startup time, and for users with a lot of gems, this can slow the terminal down DRAMATICALLY.

Adding `--no-rehash` to the init command can speed up terminal load time dramatically, at the cost of users having to rehash manually more often.

This fixes issue sorin-ionescu/prezto#335
My configs
Added my personal prompt
Add user local bin
Speed up theme slightly
Removed unused functions
Added git-escape-magic
Rearranged some things, removed others
Added submodule ignore
rearranged zpresztorc
Merge branch 'refs/heads/master' into paradox
README.md update for paradox theme
Merge pull request #1 from dwijaybane/paradox

README.md update for paradox theme
Update README.md
Update README.md
merge paradox