CR.Sparse v0.1.5

Linear Operators
- Orthogonal basis operators: Cosine, Walsh Hadamard
- General Operators: FIR, Circulant, First Derivative, Second Derivative, Running average
- Operators: Partial Op
- DOT TEST for linear operators added.

Convex optimization algorithms
- Sparsifying basis support in yall1
- TNIPM (Truncated Newton Interior Points Method) implemented.

Wavelets
- Forward DWT
- Inverse DWT
- Padding modes: symmetric, reflect, constant, zero, periodic, periodization
- Wavelet families: HAAR, DB, MEYER, SYMMETRIC, COIFLET
- Full DWT/IDWT for periodization mode
- Filtering with Upsampling/Downsampling
- Quadrature Mirror Filters
- Forward and inverse DWT along a specific axis
- 2D Forward and inverse DWT for images
- Print wavelet info
- wavelist
- families
- build_wavelet
- wavefun
- CWT for Morlet and Ricker wavelets introduced

Benchmarking
- Introduced airspeed velocity based benchmarks

General stuff
- Examples gallery introduced
- Unit test coverage is now back to 90%
- Documentation has been setup at ReadTheDocs.org also