fix: load_ses_spectra omitted last char of lines in data block

docs: added keywords in several page front matters, added link to new xps data converstion webapp

docs/data-import.md

@@ -1,6 +1,7 @@
 ---
 title: Loading ARPES data
 sidebar_label: Importing data
+keywords: ["arpes data", "ses", "scienta", "scienta-omicron"]
 ---
 At the moment, this module can only import data produced by Scienta-Omicron SES
 program. For the spectral scans, we will use the plaintext (`.txt`) output file

docs/enhancements.md

@@ -1,6 +1,7 @@
 ---
 title: Enhancing spectral features
 sidebar_label: Enhancing spectra
+keywords: ["data processing", "data refinement", "second derivative", "laplacian", "curvature method", "2d curvature"]
 ---
 
 Sometimes our spectra are not well resolved. In such cases, we may perform some

docs/gs.md

@@ -1,6 +1,7 @@
 ---
 title: Getting started
 slug: /
+keywords: ["arpes", "data analysis", "data visualization", "python", "matplotlib", "scienta-omicron", "scienta", "ses"]
 ---
 ### Prerequisite
 You will need [Python 3](https://www.python.org/), and following Python packages

docs/visualization.md

@@ -1,5 +1,6 @@
 ---
 title: Data visualization
+keywords: ["ARPES data visualization", "data visualization", "matplotlib", "python data visualization"]
 ---
 This example provides basic example of image plot using **matplotlib**. There is
 a huge list of customization possible using **matplotlib**. You can consult

docs/xps.md

@@ -68,3 +68,10 @@ If you need to load the two column data using python:
 ```python
 energy, intensity = np.loadtxt("xps_data.x_y", unpack=True)
 ```
+
+:::tip
+
+You can try our [webapp](http://pranabdas.github.io/xps/) to convert SES spectra
+into energy vs intensity two column format.
+
+:::