changes to optim formatting

<- vs =, indentation, logical. Small aesthetics I noticed while reading
through.
more small adjustments to metal.optim
added dummy text to enable installation of package without finished documentation.
kalman working – needs differential eq

kalman filter is “working” – but there is a problem with fitting
positive respiration (wrong sign given convention). When forced
negative, the fit behaves poorly. Either the lack of the differential
equation is playing a big role here, or there is a problem in how
uncertainty was propagated. Current method works well for trout bog day
319, but not on day 137.
updated Kalman to use differential eq

still getting bad fit
Added getSchmidt to be exported. Created outline manual file.
Merge branch 'master' of github.com:GLEON/LakeMetabolizer
fixed KF, adjusted Bayes output

Added KF differential EQ version. Turned metab.kalman into a function.
Compare Kalman answers to Bayes answers (Bayes commented out in
metab.kalman.R). Adjusted output for Bayes.
cleaned up documentation
Merge branch 'master' of https://github.com/GLEON/LakeMetabolizer
Merge pull request #14 from jread-usgs/master

 Fix Schmidt coefficients to use modern literature #12
bayes spacing
Cleaned up code
added line to ignore negative buoyancy values
updated reference doc
added arguments and example
Merge branch 'master' of https://github.com/GLEON/LakeMetabolizer
@rBatt, I moved your example code out of metab.kalman so the package would install.
Merge branch 'master' of github.com:GLEON/LakeMetabolizer
reworded