GenDocSvec: bugfix to match types b/w C and SQL

Pivotal Tracker: #67677020 (hit when generating big datasets for kmeans)
Deprecated profile, svd_mf, quantile

Pivotal Tracker #68032808
Additional Author Pei, Liquan <lpei@gopivotal.com>
Change list:
	1. Added in ReleaseNotes that profile, svdmf and quantile are
	deprecated
	2. Move profile, svdmf and quantile to deprecated module section
	in online documentation
	3. Change the documentation in relevant .sql_in files
Squashed commit of the following:

commit 2ffe0812dbb357b00bc3ecccd602612dfed96b68
Author: Feng, Xixuan (Aaron) <xfeng@gopivotal.com>
Date:   Thu Mar 27 13:23:29 2014 -0700

    minor fix

commit 1f150ae3bbe0c623e1bd7b706219200478474423
Author: Feng, Xixuan (Aaron) <xfeng@gopivotal.com>
Date:   Thu Mar 27 12:30:03 2014 -0700

    Deprecated profile, svd_mf, quantile
array_ops: Add array_scalar_add function

Jira: MADLIB-828

Adding a function to add a scalar to an array in a similar way to array_scalar_mult does for multiplication.
Array Ops: install-check for array_scalar_add

JIRA: MADLIB-828
Pivotal Tracker: #68393766
SVM: Fix svm_dot kernel function property

Pivotal Tracker: #68667756

Additional author: LiquanPei <liquanpei@gmail.com>
Fix python module name conflict by prepending to sys.path

JIRA: MADLIB-826
Prepend PLPYTHON_LIBDIR before trying

MADLIB-826
Fix bugs in iteration controller for HAWQ and fix user doc for cross validation

Additional Author: Qian, Hai <hqian@gopivotal.com>
Array ops: numeric type, array_filter, bug fixes

Pivotal Tracker: #68767594

Additional author: Feng, Xixuan (Aaron) <xfeng@gopivotal.com>

Changes:
- numeric type support for all functions with anyarray (MADLIB-807 and MADLIB-819)
- added array_filter (MADLIB-279)
- bug fixes and parameter validations (MADLIB-811, and more caught by adding tests)
- refactored C code to perform computation using float8
Doc: multi-logregr and elastic net minor fix

Changes:
- clarification of the optimizer parameters in multi-logregr
- default value for stopping threshold in elastic net
Documentation: array ops examples

Pivotal Tracker: #69147706

Additional author: Feng, Xixuan (Aaron) <xfeng@gopivotal.com>